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10th Grade Percentage Increase and Decrease Worksheet — Level 3 — Practice Set 2 — Answers

Answer sheet with worked solutions for the 10th Grade percentages worksheet.

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Success TutoringWorksheetsAnswer sheet10th Grade · Mathematics · Percentages

10th Grade Percentage Increase and Decrease Worksheet — Level 3 — Practice Set 2 — Answers

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

1.A price changes from $380 to $475. Find the percentage increase.

Answer: 25%

  1. Change = 475 − 380 = 95
  2. 95 ÷ 380 × 100 = 25%
2.After a 10% increase, a price is $176. What was the original price?

Answer: $160

  1. New price = 110% of the original
  2. Original = 176 ÷ 1.1
  3. = $160
3.After a 20% decrease, a price is $96. What was the original price?

Answer: $120

  1. New price = 80% of the original
  2. Original = 96 ÷ 0.8
  3. = $120
4.A price changes from $540 to $459. Find the percentage decrease.

Answer: 15%

  1. Change = 540 − 459 = 81
  2. 81 ÷ 540 × 100 = 15%
5.After a 30% increase, a price is $234. What was the original price?

Answer: $180

  1. New price = 130% of the original
  2. Original = 234 ÷ 1.3
  3. = $180
6.After a 25% decrease, a price is $90. What was the original price?

Answer: $120

  1. New price = 75% of the original
  2. Original = 90 ÷ 0.75
  3. = $120
7.After a 15% increase, a price is $552. What was the original price?

Answer: $480

  1. New price = 115% of the original
  2. Original = 552 ÷ 1.15
  3. = $480
8.After a 75% increase, a price is $210. What was the original price?

Answer: $120

  1. New price = 175% of the original
  2. Original = 210 ÷ 1.75
  3. = $120
9.After a 15% decrease, a price is $34. What was the original price?

Answer: $40

  1. New price = 85% of the original
  2. Original = 34 ÷ 0.85
  3. = $40
10.After a 10% decrease, a price is $378. What was the original price?

Answer: $420

  1. New price = 90% of the original
  2. Original = 378 ÷ 0.9
  3. = $420
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