Year 10 Percentage Increase and Decrease Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 10 percentages worksheet.
Success TutoringWorksheetsAnswer sheetYear 10 · Mathematics · PercentagesYear 10 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 $20 to $18. Find the percentage decrease.
Answer: 10%
- Change = 20 − 18 = 2
- 2 ÷ 20 × 100 = 10%
2.A price changes from $90 to $81. Find the percentage decrease.
Answer: 10%
- Change = 90 − 81 = 9
- 9 ÷ 90 × 100 = 10%
3.A price changes from $40 to $36. Find the percentage decrease.
Answer: 10%
- Change = 40 − 36 = 4
- 4 ÷ 40 × 100 = 10%
4.A price changes from $230 to $345. Find the percentage increase.
Answer: 50%
- Change = 345 − 230 = 115
- 115 ÷ 230 × 100 = 50%
5.A price changes from $170 to $136. Find the percentage decrease.
Answer: 20%
- Change = 170 − 136 = 34
- 34 ÷ 170 × 100 = 20%
6.A price changes from $350 to $175. Find the percentage decrease.
Answer: 50%
- Change = 350 − 175 = 175
- 175 ÷ 350 × 100 = 50%
7.A price changes from $260 to $325. Find the percentage increase.
Answer: 25%
- Change = 325 − 260 = 65
- 65 ÷ 260 × 100 = 25%
8.A price changes from $150 to $180. Find the percentage increase.
Answer: 20%
- Change = 180 − 150 = 30
- 30 ÷ 150 × 100 = 20%
9.A price changes from $240 to $264. Find the percentage increase.
Answer: 10%
- Change = 264 − 240 = 24
- 24 ÷ 240 × 100 = 10%
10.A price changes from $260 to $195. Find the percentage decrease.
Answer: 25%
- Change = 260 − 195 = 65
- 65 ÷ 260 × 100 = 25%
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