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7th Grade Percentage Increase and Decrease Worksheet — Level 3 — Practice Set 3 — Answers

Answer sheet with worked solutions for the 7th Grade percentages worksheet.

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Success TutoringWorksheetsAnswer sheet7th Grade · Mathematics · Percentages

7th 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 $80 to $64. Find the percentage decrease.

Answer: 20%

  1. Change = 80 − 64 = 16
  2. 16 ÷ 80 × 100 = 20%
2.After a 75% increase, a price is $665. What was the original price?

Answer: $380

  1. New price = 175% of the original
  2. Original = 665 ÷ 1.75
  3. = $380
3.After a 75% decrease, a price is $105. What was the original price?

Answer: $420

  1. New price = 25% of the original
  2. Original = 105 ÷ 0.25
  3. = $420
4.A price changes from $540 to $702. Find the percentage increase.

Answer: 30%

  1. Change = 702 − 540 = 162
  2. 162 ÷ 540 × 100 = 30%
5.After a 40% decrease, a price is $228. What was the original price?

Answer: $380

  1. New price = 60% of the original
  2. Original = 228 ÷ 0.6
  3. = $380
6.A price changes from $760 to $912. Find the percentage increase.

Answer: 20%

  1. Change = 912 − 760 = 152
  2. 152 ÷ 760 × 100 = 20%
7.A price changes from $800 to $840. Find the percentage increase.

Answer: 5%

  1. Change = 840 − 800 = 40
  2. 40 ÷ 800 × 100 = 5%
8.After a 10% increase, a price is $726. What was the original price?

Answer: $660

  1. New price = 110% of the original
  2. Original = 726 ÷ 1.1
  3. = $660
9.After a 20% increase, a price is $672. What was the original price?

Answer: $560

  1. New price = 120% of the original
  2. Original = 672 ÷ 1.2
  3. = $560
10.After a 25% increase, a price is $975. What was the original price?

Answer: $780

  1. New price = 125% of the original
  2. Original = 975 ÷ 1.25
  3. = $780
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