Practice B 8-4 - MrWalkerHomework

Name Date ClassLESSON8-4Practice BPercent Increase and DecreaseFind each percent increase or decrease to the nearest percent.1. from 16 to 20 2. from 30 to 24 3. from 15 to 304. from 35 to 21 5. from 40 to 46 6. from 45 to 637. from 18 to 26.1 8. from 24.5 to 21.56 9. from 90 to 7210. from 29 to 54 11. from 42 to 92.4 12. from 38 to 3313. from 64 to 36.4 14. from 78 to 136.5 15. from 89 to 32.916. Mr. Havel bought a car for $2400 and sold it for $2700.What was the percent of profit for Mr. Havel in selling the car?17. A computer store buys a computer program for $24 andsells it for $91.20. What is the percent of increase in theprice?18. A manufacturing company with 450 employees beginsa new product line and must add 81 more employees.What is the percent of increase in the number of employees?19. Richard earns $2700 a month. He received a 3% raise.What is Richard’s new annual salary?20. Marlis has 765 cards in her baseball card collection.She sells 153 of the cards. What is the percent ofdecrease in the number of cards in the collection?Copyright © by Holt, Rinehart and Winston.38 Holt Middle School MathAll rights reserved.

LESSON8-4Practice BPercent Increase and DecreaseFind each percent increase or decrease to the nearest percent.1. from 16 to 20 2. from 30 to 24 3. from 15 to 30LESSON8-4Practice CPercent Increase and DecreaseFind each percent increase or decrease to the nearest percent.1. from 120 to 162 2. from 84 to 47.04 3. from 72 to 46.8increase 25%decrease 20%increase 100%increase 35%decrease 44%decrease 35%4. from 35 to 21 5. from 40 to 46 6. from 45 to 63decrease 40%7. from 18 to 26.1 8. from 24.5 to 21.56 9. from 90 to 72increase 45%10. from 29 to 54 11. from 42 to 92.4 12. from 38 to 33increase 86%13. from 64 to 36.4 14. from 78 to 136.5 15. from 89 to 32.9decrease 43%increase 15%decrease 12%increase 120%increase 75%16. Mr. Havel bought a car for $2400 and sold it for $2700.What was the percent of profit for Mr. Havel in selling the car?17. A computer store buys a computer program for $24 andsells it for $91.20. What is the percent of increase in theprice?18. A manufacturing company with 450 employees beginsa new product line and must add 81 more employees.What is the percent of increase in the number of employees?19. Richard earns $2700 a month. He received a 3% raise.What is Richard’s new annual salary?increase 40%decrease 20%decrease 13%decrease 63%12.5%280%18%$33,37220. Marlis has 765 cards in her baseball card collection.She sells 153 of the cards. What is the percent ofdecrease in the number of cards in the collection? 20%4. from 90 to 189 5. from 67 to 112 6. from 153 to 109increase 110%Find each missing number.7. originally: $300 8. originally: $850new price: $450 new price: $1147.5050% increase 35 % increase9. originally: $2500 10. originally: $ 2100new price: $825 new price: $84067increase 67%% decrease 60% decrease11. originally: $200 12. originally: $4.20new price: $ 474new price: $6.09137% increase 45 % increase13. Fandango Store buys a computer program for $244. It sellsthe computer program for $927.20. What is the percent ofincrease in the price?14. Denise buys a shirt on sale for $21.08. This representsa 15% decrease in price. What was the original priceof the shirt?decrease 29%280%$24.8015. A storeowner purchases 40 shirts for $600. She thenadds 40% to her cost and tags each shirt with the sameselling price. What is the amount of profit for each shirt? $6Copyright © by Holt, Rinehart and Winston.38 Holt Middle School MathAll rights reserved.Copyright © by Holt, Rinehart and Winston.39 Holt Middle School MathAll rights reserved.LESSON8-4ReteachPercent Increase and DecreaseTo find the percent increase:• Find the amount of increase by subtracting the lessernumber from the greater.amount of increase• Write a fraction: percent increase original amount• If possible, simplify the fraction.• Rewrite the fraction as a percent.The temperature increased from 60°F to 75°F.Find the percent of increase.percent of increase 75° 60°60° 1 5°6 1 0°4 25%Complete to find each percent increase.1. Membership 2. Savingsincreased from increased from80 to 100. $500 to $750. 20 250201 8 0 250 1 4 2 500 25 % 50 %3. Price increasedfrom $20 to $23. 230 100 8023 20 3750 5000.15 230 203.00 15 %Find the amount of increase.amount of increasepercent increase original amountChange the fraction to a percent.Find the amount of increase.amount of increasepercent increase original amountChange the fraction to a percent.LESSON8-4ReteachPercent Increase and Decrease (continued)To find the percent decrease:• Find the amount of decrease by subtracting the lesser number fromthe greater.amount of decrease• Write a fraction: percent decrease original amount• If possible, simplify the fraction.• Rewrite the fraction as a percent.Carl’s weight decreased from 175 lb to 150 lb.Find the percent of decrease.percent of decrease 175 150 25 1751 1 0.143 71.000 14.3%757Complete to find each percent decrease.4. Enrollment 5. Temperaturedecreased from decreased from1000 to 950. 75°F to 60°F.1000 95050 515 10 00 10 07 5 3 20 151 00 5 % 20 %6. Sale pricedecreased from$22 to $17.52 2 2525022 17 575 60150.227 225.000 22.7 %Find the amount ofdecrease.amount of decreasepercent decrease original amountChange the fraction to a percent.Find the amount of decrease.amount of decreasepercent decrease original amountChange the fraction to a percent.Copyright © by Holt, Rinehart and Winston.40 Holt Middle School MathAll rights reserved.Copyright © by Holt, Rinehart and Winston.41 Holt Middle School MathAll rights reserved.Copyright © by Holt, Rinehart and Winston.92 Holt Middle School MathAll rights reserved.