Year 11 Percentage Increase and Decrease Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 11 percentages worksheet.
Success TutoringWorksheetsAnswer sheetYear 11 · Mathematics · PercentagesYear 11 Percentage Increase and Decrease Worksheet — Level 1 — Practice Set 3 — Answers
Percentage change = change ÷ original amount × 100. Always divide by the original amount.
1.A price changes from $80 to $96. Find the percentage increase.
Answer: 20%
- Change = 96 − 80 = 16
- 16 ÷ 80 × 100 = 20%
2.A price changes from $110 to $55. Find the percentage decrease.
Answer: 50%
- Change = 110 − 55 = 55
- 55 ÷ 110 × 100 = 50%
3.A price changes from $160 to $128. Find the percentage decrease.
Answer: 20%
- Change = 160 − 128 = 32
- 32 ÷ 160 × 100 = 20%
4.A price changes from $190 to $95. Find the percentage decrease.
Answer: 50%
- Change = 190 − 95 = 95
- 95 ÷ 190 × 100 = 50%
5.A price changes from $330 to $363. Find the percentage increase.
Answer: 10%
- Change = 363 − 330 = 33
- 33 ÷ 330 × 100 = 10%
6.A price changes from $220 to $330. Find the percentage increase.
Answer: 50%
- Change = 330 − 220 = 110
- 110 ÷ 220 × 100 = 50%
7.A price changes from $100 to $90. Find the percentage decrease.
Answer: 10%
- Change = 100 − 90 = 10
- 10 ÷ 100 × 100 = 10%
8.A price changes from $280 to $308. Find the percentage increase.
Answer: 10%
- Change = 308 − 280 = 28
- 28 ÷ 280 × 100 = 10%
9.A price changes from $390 to $312. Find the percentage decrease.
Answer: 20%
- Change = 390 − 312 = 78
- 78 ÷ 390 × 100 = 20%
10.A price changes from $360 to $180. Find the percentage decrease.
Answer: 50%
- Change = 360 − 180 = 180
- 180 ÷ 360 × 100 = 50%
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