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8th Grade Percentage Increase and Decrease Worksheet — Level 3 — Answers

Answer sheet with worked solutions for the 8th Grade percentages worksheet.

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Success TutoringWorksheetsAnswer sheet8th Grade · Mathematics · Percentages

8th Grade Percentage Increase and Decrease Worksheet — Level 3 — Answers

Percentage change = change ÷ original amount × 100. Always divide by the original amount.

1.After a 40% decrease, a price is $48. What was the original price?

Answer: $80

  1. New price = 60% of the original
  2. Original = 48 ÷ 0.6
  3. = $80
2.After a 60% increase, a price is $64. What was the original price?

Answer: $40

  1. New price = 160% of the original
  2. Original = 64 ÷ 1.6
  3. = $40
3.A price changes from $260 to $273. Find the percentage increase.

Answer: 5%

  1. Change = 273 − 260 = 13
  2. 13 ÷ 260 × 100 = 5%
4.A price changes from $480 to $600. Find the percentage increase.

Answer: 25%

  1. Change = 600 − 480 = 120
  2. 120 ÷ 480 × 100 = 25%
5.After a 60% increase, a price is $640. What was the original price?

Answer: $400

  1. New price = 160% of the original
  2. Original = 640 ÷ 1.6
  3. = $400
6.After a 20% increase, a price is $816. What was the original price?

Answer: $680

  1. New price = 120% of the original
  2. Original = 816 ÷ 1.2
  3. = $680
7.After a 40% increase, a price is $364. What was the original price?

Answer: $260

  1. New price = 140% of the original
  2. Original = 364 ÷ 1.4
  3. = $260
8.A price changes from $420 to $252. Find the percentage decrease.

Answer: 40%

  1. Change = 420 − 252 = 168
  2. 168 ÷ 420 × 100 = 40%
9.A price changes from $660 to $462. Find the percentage decrease.

Answer: 30%

  1. Change = 660 − 462 = 198
  2. 198 ÷ 660 × 100 = 30%
10.A price changes from $60 to $72. Find the percentage increase.

Answer: 20%

  1. Change = 72 − 60 = 12
  2. 12 ÷ 60 × 100 = 20%
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