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9th Grade Percentage Increase and Decrease Worksheet — Level 3 — Practice Set 2 — 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 2 — Answers

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

1.After a 60% decrease, a price is $224. What was the original price?

Answer: $560

  1. New price = 40% of the original
  2. Original = 224 ÷ 0.4
  3. = $560
2.A price changes from $580 to $551. Find the percentage decrease.

Answer: 5%

  1. Change = 580 − 551 = 29
  2. 29 ÷ 580 × 100 = 5%
3.After a 25% increase, a price is $525. What was the original price?

Answer: $420

  1. New price = 125% of the original
  2. Original = 525 ÷ 1.25
  3. = $420
4.After a 20% decrease, a price is $368. What was the original price?

Answer: $460

  1. New price = 80% of the original
  2. Original = 368 ÷ 0.8
  3. = $460
5.After a 25% decrease, a price is $270. What was the original price?

Answer: $360

  1. New price = 75% of the original
  2. Original = 270 ÷ 0.75
  3. = $360
6.A price changes from $560 to $616. Find the percentage increase.

Answer: 10%

  1. Change = 616 − 560 = 56
  2. 56 ÷ 560 × 100 = 10%
7.A price changes from $500 to $650. Find the percentage increase.

Answer: 30%

  1. Change = 650 − 500 = 150
  2. 150 ÷ 500 × 100 = 30%
8.After a 25% decrease, a price is $225. What was the original price?

Answer: $300

  1. New price = 75% of the original
  2. Original = 225 ÷ 0.75
  3. = $300
9.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
10.After a 10% increase, a price is $330. What was the original price?

Answer: $300

  1. New price = 110% of the original
  2. Original = 330 ÷ 1.1
  3. = $300
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