LESSON Practice B Percent Increase and Decrease

1 Copyright by Holt, Rinehart and Middle School MathAll rights BPercent Increase and Decrease8-4 LESSONFind each Percent Increase or Decrease to the nearest 16 to 30 to 15 to 35 to 40 to 45 to 18 to to 90 to 29 to 42 to 38 to 64 to 78 to 89 to Havel bought a car for $2400 and sold it for $ was the Percent of profit for Mr. Havel in selling the car? computer store buys a computer program for $24 and sells it for $ What is the Percent of Increase in the price? manufacturing company with 450 employees begins a new product line and must add 81 more is the Percent of Increase in the number of employees? earns $2700 a month. He received a 3% is Richard s new annual salary?

2 Has 765 cards in her baseball card sells 153 of the cards. What is the Percent of Decrease in the number of cards in the collection?Copyright by Holt, Rinehart and Middle School MathAll rights by Holt, Rinehart and Middle School MathAll rights BPercent Increase and Decrease8-4 LESSONFind each Percent Increase or Decrease to the nearest 16 to 30 to 15 to 35 to 40 to 45 to 18 to to 90 to 29 to 42 to 38 to 64 to 78 to 89 to Havel bought a car for $2400 and sold it for $ was the Percent of profit for Mr. Havel in selling the car? computer store buys a computer program for $24 and sells it for $ What is the Percent of Increase in the price? manufacturing company with 450 employees begins a new product line and must add 81 more is the Percent of Increase in the number of employees?

3 Earns $2700 a month. He received a 3% is Richard s new annual salary? has 765 cards in her baseball card sells 153 of the cards. What is the Percent of Decrease in the number of cards in the collection?20%$33,37218%280% 63% Increase 75% Decrease 43% Decrease 13% Increase 120% Increase 86% Decrease 20% Decrease 12% Increase 45% Increase 40% Increase 15% Decrease 40% Increase 100% Decrease 20% Increase 25%Copyright by Holt, Rinehart and Middle School MathAll rights CPercent Increase and Decrease8-4 LESSONFind each Percent Increase or Decrease to the nearest 120 to 84 to 72 to 90 to 67 to 153 to 109 Find each missing : $ : $850new price: $450new price: $ Increase % : $ : $new price: $825new price: $840% decrease60% : $ : $ price: $new price: $ Increase % Store buys a computer program for $244.

4 It sells the computer program for $ What is the Percent of Increase in the price? buys a shirt on sale for $ This represents a 15% Decrease in price. What was the original price of the shirt? storeowner purchases 40 shirts for $600. She then adds 40% to her cost and tags each shirt with the same selling price. What is the amount of profit for each shirt?$6$ 29% Increase 67% Increase 110% Decrease 35% Decrease 44% Increase 35%Copyright by Holt, Rinehart and Middle School MathAll rights Increase and Decrease8-4 LESSONTo find the Percent Increase : Find the amount of Increase by subtracting the lessernumber from the greater. Write a fraction: Percent Increase If possible, simplify the fraction.

5 Rewrite the fraction as a temperature increased from 60 F to 75 the Percent of of Increase 75 6 0 60 1650 14 25%Complete to find each Percent from increased from80 to 100.$500 to $750. 8200 520500 % % increased from $20 to $23. 230 230 20 3 .0 0 %1523 20 35025 12 14 25020750 500100 80amount of Increase original the amount of Increase Change the fraction to a the amount of Increase Change the fraction to a of Increase original amountamount of Increase original amountCopyright by Holt, Rinehart and Middle School MathAll rights Increase and Decrease (continued)8-4 LESSONTo find the Percent Decrease : Find the amount of Decrease by subtracting the lesser number fromthe greater.

6 Write a fraction: Percent Decrease If possible, simplify the fraction. Rewrite the fraction as a s weight decreased from 175 lb to 150 the Percent of of Decrease 1751 75150 12755 17 7 1 .0 0 0 to find each Percent from decreased from1000 to F to 60 F. 105000 1050 7155 135 12000 % % pricedecreased from$22 to $17. 252 252 22 5 .0 0 0 % 17 5205155075 601000 950amount of Decrease original the amount Decrease Change the fraction to a the amount of Decrease Change the fraction to a of Decrease original amountamount of Decrease original amountMSM04G8_RESBK_Ch08_085-101 3/12/03 12:09 PM Page 92