Year 9 Percentage Increase and Decrease Worksheet — Level 1 — Practice Set 4 — Answers
Answer sheet with worked solutions for the Year 9 percentages worksheet.
Success TutoringWorksheetsAnswer sheetYear 9 · Mathematics · PercentagesYear 9 Percentage Increase and Decrease Worksheet — Level 1 — Practice Set 4 — Answers
Percentage change = change ÷ original amount × 100. Always divide by the original amount.
1.A price changes from $370 to $296. Find the percentage decrease.
Answer: 20%
- Change = 370 − 296 = 74
- 74 ÷ 370 × 100 = 20%
2.A price changes from $160 to $144. Find the percentage decrease.
Answer: 10%
- Change = 160 − 144 = 16
- 16 ÷ 160 × 100 = 10%
3.A price changes from $210 to $252. Find the percentage increase.
Answer: 20%
- Change = 252 − 210 = 42
- 42 ÷ 210 × 100 = 20%
4.A price changes from $190 to $171. Find the percentage decrease.
Answer: 10%
- Change = 190 − 171 = 19
- 19 ÷ 190 × 100 = 10%
5.A price changes from $40 to $36. Find the percentage decrease.
Answer: 10%
- Change = 40 − 36 = 4
- 4 ÷ 40 × 100 = 10%
6.A price changes from $240 to $216. Find the percentage decrease.
Answer: 10%
- Change = 240 − 216 = 24
- 24 ÷ 240 × 100 = 10%
7.A price changes from $320 to $256. Find the percentage decrease.
Answer: 20%
- Change = 320 − 256 = 64
- 64 ÷ 320 × 100 = 20%
8.A price changes from $60 to $66. Find the percentage increase.
Answer: 10%
- Change = 66 − 60 = 6
- 6 ÷ 60 × 100 = 10%
9.A price changes from $100 to $120. Find the percentage increase.
Answer: 20%
- Change = 120 − 100 = 20
- 20 ÷ 100 × 100 = 20%
10.A price changes from $310 to $372. Find the percentage increase.
Answer: 20%
- Change = 372 − 310 = 62
- 62 ÷ 310 × 100 = 20%
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