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Year 11 Percentage Increase and Decrease Worksheet — Level 3 — Practice Set 3 — Answers

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Success TutoringWorksheetsAnswer sheetYear 11 · Mathematics · Percentages

Year 11 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 $620 to $1085. Find the percentage increase.

Answer: 75%

  1. Change = 1085 − 620 = 465
  2. 465 ÷ 620 × 100 = 75%
2.After a 40% increase, a price is $392. What was the original price?

Answer: $280

  1. New price = 140% of the original
  2. Original = 392 ÷ 1.4
  3. = $280
3.After a 10% decrease, a price is $324. What was the original price?

Answer: $360

  1. New price = 90% of the original
  2. Original = 324 ÷ 0.9
  3. = $360
4.After a 15% increase, a price is $207. What was the original price?

Answer: $180

  1. New price = 115% of the original
  2. Original = 207 ÷ 1.15
  3. = $180
5.A price changes from $240 to $192. Find the percentage decrease.

Answer: 20%

  1. Change = 240 − 192 = 48
  2. 48 ÷ 240 × 100 = 20%
6.After a 40% decrease, a price is $36. What was the original price?

Answer: $60

  1. New price = 60% of the original
  2. Original = 36 ÷ 0.6
  3. = $60
7.A price changes from $780 to $975. Find the percentage increase.

Answer: 25%

  1. Change = 975 − 780 = 195
  2. 195 ÷ 780 × 100 = 25%
8.After a 25% increase, a price is $700. What was the original price?

Answer: $560

  1. New price = 125% of the original
  2. Original = 700 ÷ 1.25
  3. = $560
9.A price changes from $340 to $408. Find the percentage increase.

Answer: 20%

  1. Change = 408 − 340 = 68
  2. 68 ÷ 340 × 100 = 20%
10.A price changes from $800 to $480. Find the percentage decrease.

Answer: 40%

  1. Change = 800 − 480 = 320
  2. 320 ÷ 800 × 100 = 40%
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