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9th Grade Percentage Increase and Decrease Worksheet — Level 3 — Practice Set 3 — Answers

Answer sheet with worked solutions for the 9th Grade percentages worksheet.

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Success TutoringWorksheetsAnswer sheet9th Grade · Mathematics · Percentages

9th Grade Percentage Increase and Decrease Worksheet — Level 3 — Practice Set 3 — Answers

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

1.A price changes from $420 to $483. Find the percentage increase.

Answer: 15%

  1. Change = 483 − 420 = 63
  2. 63 ÷ 420 × 100 = 15%
2.A price changes from $160 to $224. Find the percentage increase.

Answer: 40%

  1. Change = 224 − 160 = 64
  2. 64 ÷ 160 × 100 = 40%
3.After a 40% increase, a price is $952. What was the original price?

Answer: $680

  1. New price = 140% of the original
  2. Original = 952 ÷ 1.4
  3. = $680
4.After a 60% increase, a price is $1280. What was the original price?

Answer: $800

  1. New price = 160% of the original
  2. Original = 1280 ÷ 1.6
  3. = $800
5.After a 40% increase, a price is $532. What was the original price?

Answer: $380

  1. New price = 140% of the original
  2. Original = 532 ÷ 1.4
  3. = $380
6.A price changes from $240 to $288. Find the percentage increase.

Answer: 20%

  1. Change = 288 − 240 = 48
  2. 48 ÷ 240 × 100 = 20%
7.After a 20% decrease, a price is $560. What was the original price?

Answer: $700

  1. New price = 80% of the original
  2. Original = 560 ÷ 0.8
  3. = $700
8.After a 40% decrease, a price is $156. What was the original price?

Answer: $260

  1. New price = 60% of the original
  2. Original = 156 ÷ 0.6
  3. = $260
9.A price changes from $40 to $32. Find the percentage decrease.

Answer: 20%

  1. Change = 40 − 32 = 8
  2. 8 ÷ 40 × 100 = 20%
10.A price changes from $100 to $85. Find the percentage decrease.

Answer: 15%

  1. Change = 100 − 85 = 15
  2. 15 ÷ 100 × 100 = 15%
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