Math Word Problems for Students — page 72

First find the number of boats eaten by fish: 30 boats * 20% = 6 boats Then subtract the two groups of boats that were destroyed from the original number to find the number left: 30 boats - 6 boats - 2 boats = 22 boats

The cost of the dolls is 3 × $1 = $3. Amy has $100 − $3 = $97 left.

The normal price of the lessons would be 20*40=$800 The discount saves him 800*.25=$200 So the lessons cost him 800-200=$600 That means everything costs 500+600=$1100

The total ratio representing the number of photos in the Malachi gallery is 10+17=27 The difference in the ratios representing the number of photos Malachi took this year and last year is 17-10=7. This year, Malachi took 7/27*2430= 630 more photos than he took last year.

18 inches is equal to 18/12 = 1.5 feet. Each row is 120 feet long, so there are 120/1.5 = 80 18-inch lengths on which seeds can be planted.

Tyson bought 80/20=4 joggers. Alexander bought 4+22=26 joggers. Christopher bought 80-26=54 more joggers than Alexander.

The driving time is 480/60= 8 hours The time for breaks was 30+15+15=60 minutes So she spent 60/60=1 hour for rest stops. So it took her 8+1=9 hours

Amanda has 7 - 3 = 4 candy bars. Amandy gives her sister 4 x 3 = 12 candy bars. She has 30 - 12 = 18 candy bars remaining. In total she keeps 18 + 4 = 22 candy bars.

First, we need to determine how many hours Jill studied in total. To find this out, we begin by performing 2*2= 4 hours spent on day two, double what she spent on day 1. Next, we perform 4-1= 3 hours to determine the amount she studied on the third day. We then add 2+4+3= 9 hours spent in total across 3 days. Since there are 60 minutes in an hour, she studied 9*60=540 minutes in total.

The students' entrance fee cost $5 x 35 = $175. The adults' entrance fee cost $6 x 4 = $24. Therefore, the school will pay a total of $175 + $24 = $199 for the farm entrance.

There are a total of 52 + 38 = 90 parking spaces in the school. Since half of the spaces are filled then, 38 x 1/2 = 19 cars have parked at the back. So, a total of 39 + 19 = 58 cars have parked in the school. Therefore, 90 - 58 = 32 parking spaces are still available.

Her son has 3 teachers and her daughter has 4, so together they have 3+4 = 7 teachers Harper has already spent $70 on 7 gifts, so she spent $70/7 = $10 per gift

Roberto skips 70 times per minute because 4,200 / 60 = 70. Together they skip 150 times a minute. They will skip 2,250 times because 150 x 15 = 2,250

There are 180 days in the school year and she can miss up to 5% so that’s 180*.05 = 9 days Hazel has been sick 6 days already and she can only miss 9 days or less so she can miss 9-6 = 3 more days

First find the total number of The Art of the Deal votes Fran throws away: 80% * 20 votes = 16 votes Then subtract these votes from the total number of The Art of the Deal votes to find the altered number: 20 votes - 16 votes = 4 votes Then divide the total number Twilight votes by 2 to find the altered number of votes: 12 votes / 2 = 6 votes Then add the altered number of votes for each book to find the total altered number of votes: 6 votes + 4 votes + 10 votes = 20 votes Then divide the number of votes for Game of Thrones by the total altered number of votes and multiply by 100% to express the answer as a percentage: 10 votes / 20 votes * 100% = 50%

If he reserves 160 sq. ft. of space for a desk and some walking space, then he will have 400-160=240 sq. ft. of space remaining. If each bookshelf takes up 80 sq. ft. of space, then 240 sq ft can contain 240/80=3 bookshelves.

Julia spend $40 / 2 = $20 on the game. After buying the game, she has $40 - $20 = $20 left. She spent $20 / 4 = $5 on in-game purchases. She has $20 - $5 = $15 left.

If Liz needs only $4,000 to buy a new $30,000 car, that means she has $30,000-$4,000=$26,000 from the proceeds of selling her old car If she sold her car at 80% of what she originally paid for and sold it for $26,000 then she originally paid $26,000/80% = $32,500 for her old car If she paid $32,500 for her old car and the new one is $30,000 then, the new one is $32,500-$30,000 = $2,500 cheaper

If Zack's classroom had 22 students when he was absent, then the total students in his class are 22+1 = 23 If Tina's classroom has as many students as Maura's then T=M If Zack's classroom has half the amount of total students between Tina and Maura's classrooms then 23 = 1/2* (T+M ) 23 = 1/2*(T+M) We know from above that T=M, therefore 23 = (1/2) * (M+M) or 23 = (1/2)*2M 23 = M Because T = M, then T is also T=23. Between the three classes then we have a total of T+M+Z or 23+23+23=69

The total marks Amaya scored more in Music than in Maths is 1/10 * 70 = 7 marks. So the total marks she scored in Maths is 70 - 7 = 63 marks. If she scored 20 marks fewer in Maths than in Arts, then he scored 63 + 20 = 83 in Arts. If she scored 10 marks more in Social Studies than in Music, then she scored 70 + 10 = 80 marks in Social Studies. The total number of marks for all the subjects is 70 + 63 + 83 + 80 = 296 marks.

Perry added 88 / 2 = 44 grams of fat to the recipe. Thus, he added 44 / 4 = 11 grams of fat to each serving of food.

The number of blue apples is 5, and if you receive twice as many yellow apples as the number of blue apples, there will be 5*2 = 10 yellow apples. After receiving the yellow apples, you now have 10 yellow apples+5 blue apples = 15 apples. When you give 1/5 of the total number of apples to the son, you part with 1/5*15 = 3 apples. The total number of apples remaining is 15-3 = 12 apples.

If half of the people in Nantucket are going to the planned meeting, then there are 1/2*300 = 150 people going to the meeting. If the number of males going to the meeting is twice the number of females, we'll assume the number of females is x and the number of males is 2x. We know that x+2x=150 Adding like terms produces 3x=150 After dividing both sides by 3, we have x = 150/3 = 50 The number of females attending the meeting is x = 50

Karen makes $3000 / (3/4) = $4000 per month. In three months, Karen would make a total of $4000 * 3 = $12000. To make the same amount of money John would need to work $12000 / $3000 = 4 months.

40% of champions are men because 100 - 60 = 40 10 champions have been men because 25 x .4 = 10 4 champions have been men with beards because 10 x .4 = 4

Emma’s sister is 7 + 9 = 16 years old. In this many years, Emma’s sister will be 56 years old: 56 - 16 = 40 years. When her sister is 56 years old, Emma will be 7 + 40 = 47 years.

With 2 tractor teams working for 2 days, this is like 2*2=4 days worth of work by a single tractor, which they call tractor days. With 5 tractor teams working for 4 days, this is 7*3=21 tractor days. In total, the effort of all the tractor teams is 4+21=25 tractor days. If they need to plant 1700 acres with their 25 tractor days, then each tractor team needs to plant 1700/25 = 68 acres of cotton per day.

The salesman sold 17 bags for 17 bags x $18/bag = $306 He sold 10 more for 10 bags x $25/bag = $250 Thus far he has sold 17 bags + 10 bags = 27 bags Therefore he sold 48 bags - 27 bags = 21 bags for $22 each 21 bags were sold for 21 bags x $22/bag = $462 In total the salesman made $306 + $250 + $462 = $1018 The salesman made $1018 - $576 = $442 in profit.

The combined cost of the bananas, bread, and milk was 12 + 9 + 7 = $28. The difference between this and the total is the cost of the apples, which must have therefore cost Olivia 42 – 28 = $14.

If Alice has 60 pens, Clara 2/5*60=24 pens. The number of pens that Alice has more than Clara is 60-24=36 Since Alice is 20, and the number of pens that Alice has more than Clara is their age difference, Clara is 20+36=56 years old. In five years, Clara's age will be 56+5=61 years.

Mario's $18 cut on Monday would have been 50% more expensive on Sunday or $18*50% = $9 more expensive That means he would have paid $9 more on Sunday than what he paid ($18) on Monday or $9+$18 = $27

The height of the second tree is 6 + 5 = 11 feet. Thus, the combined height of the two trees is 6 + 11 = 17 feet. Therefore the height of the tallest tree is 2 x 17 = 34 feet.

You first have to calculate the total mass of apples he had on the shelves, so you add the three kinds of apples: 23 kg + 37 kg + 14 kg = 74kg Since he sold 36 kg of apples, he still has: 74 kg – 36 kg = 38kg

Company A earned 300 * 4 = $1200 for big bottles of milk. Company B earned 350 * 3.5 = $1225 for big bottles of milk. Company B earned 1225 - 1200 = $25 more than company A.

On the second race he won $11 because 1+ 5 x 2 = 11 On the third race he lost $15 because 10 x 1.5 = 15 He lost a total of $20 on the first and third races because 15 + 5 = 20 He lost $9 that day because 11 - 20 = -9 He lost an average of $3 per race because 9 / 3 = 3

On Wednesday, Liza had $800 - $450 = $350 left in her account. After depositing on Thursday, she had $350 + $1500 = $1850 in her account. On Friday, she paid a total of $117 + $100 = $217 for her electricity and internet bills. So, $1850 - $217 = $1633 was left on her account on Friday. After paying her phone bill, Liza has $1633 - $70 = $1563 left in her account.

Mrs. Fredrickson has 80 x 1/4 = 20 roosters. So he has 80 - 20 = 60 hens. Only 60 x 3/4 = 45 of the hens lay eggs. Thus, 60 - 45 = 15 hens do not lay eggs. Therefore, Mr. Fredrickson has a total of 15 hens + 20 roosters = 35 chickens that do not lay eggs.

We first need to figure out how many of each type of skeleton there are. Since half the 20 skeletons are adult women, that means there are 20/2=10 adult women's skeletons. The remaining half, 10, is split between adult men and children, meaning there are 10/2= 5 of each. Since an adult woman has 20 bones in their body, this means that the 10 skeletons have 20*10=200 bones in total. Since an adult man has 5 more bones in their body than an adult woman, this means they have 20+5= 25 bones in their body. There are 5 adult men, meaning there are 25*5=125 bones in the adult male skeletons in total. Since a child has half as many bones as the 20 in an adult woman, this means the children have 20/2= 10 bones in their body. Since there are 5 children, this means there are 5*10= 50 bones in the children's skeletons in total. Therefore, altogether there are 50+125+200= 375 bones in total in the graveyard.

Alexa and Emily spend a total of $10 + $5 + $3 = $18. They make a total of $4 x 21 = $84. They make a profit of $84 - $18 = $66.

He sells 2 suits that are $700.00 each for a total of 2*700 = $1,400.00 He sells 6 shirts that are $50.00 each for a total of 6*50 = $300.00 He sells 2 pairs of loafers that are $150.00 each for a total of 2*150 = $300.00 All total he sells 1400+300+300 = $2,000.00 worth of clothing He gets a 15% commission off of the the $2,000.00 so he earns .15*2000 = $300.00

The frame she initially intended to buy was 20/100*$60=$12 more expensive than she had thought. This means the frame was being sold at $60+$12 = $72 If she paid for a smaller frame at 3/4 the price of the frame she initially intended to buy, she paid 3/4*$72 = $54 Yvette remained with $60-$54 = $6

500/ 2/5 = 200 seats are already taken. 500/ 1/10 = 50 seats are broken. So 200 + 50 = 250 seats are either taken or broken. Therefore, 500 - 250 = 250 seats are still available.

First find how fast Bill can dig through clay: 4 feet/hour / 2 = 2 feet/hour Then find how long he spends digging through clay in total: 8 feet / 2 feet/hour = 4 hours Then find how long he spends digging through soil in total: 24 feet / 4 feet/hour = 6 hours Then add the time he spends digging through soil and clay to find the total digging time: 4 hours + 6 hours = 10 hours

A cake for eight people would require 8 / 4 = 2 times as many eggs as a 4 people cake. If a 4-person cake requires 2 eggs, then an 8-person cake requires 2 x 2 = 4 eggs. Tyler needs to buy 4 - 3 = 1 more egg.

If there were beacon towers every 5 kilometers along the 7300 kilometer length of the Great Wall, then there were 7300/5=1460 beacon towers. If every tower had two soldiers, then there were a total of 1460*2=2920 soldiers in beacon towers along the Great Wall.

The total ratio representing the number of electric poles and wires is 1+3=4 The fraction representing the number of wires required to connect the neighborhood's electricity is 3/4 If 3/4 represents 45, the number of wires required for the connections, then the total fraction which is 4/4, representing the poles and wires needed, represents 4/4*45*4/3=60 Since the total number of wires and poles required is 60, and the number of electric wires to be used is 45, the number of poles required is 60-45=15

Cody ate 12/3=4 sandwiches. Trevor ate 12/4=3 sandwiches. Cody and Trevor ate 4+3=7 sandwiches. There are 12-7=5 sandwiches left

The proportion of plates that he has out of total states is .8 because 40 / 50 = .8 He has 80% of the plates because .8 x 100 = 80 He makes $160 because 80 x 2 = 160

If there are 19 humans for every one beaver, then there are 38 million/19=2 million beavers in Canada. And if for every one moose there are two beavers, then the moose population of Canada is 2 million/2=1 million.

Half of the floors have different numbers of apartments. Half the number of floors is 12 floors / 2 = 6 floors. One half of the block consists of 6 floors * 6 apartments/floor = 36 apartments. And the other half consists of 6 floors * 5 apartments/floor = 30 apartments. There are 30 + 36 = 66 apartments on all floors in the block. All the apartments can therefore accommodate 66 apartments * 4 residents/apartment = 264 residents.