Year 9 Percentage Increase and Decrease Worksheet — Level 1 — Practice Set 2 — 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 2 — Answers
Percentage change = change ÷ original amount × 100. Always divide by the original amount.
1.A price changes from $340 to $306. Find the percentage decrease.
Answer: 10%
- Change = 340 − 306 = 34
- 34 ÷ 340 × 100 = 10%
2.A price changes from $320 to $240. Find the percentage decrease.
Answer: 25%
- Change = 320 − 240 = 80
- 80 ÷ 320 × 100 = 25%
3.A price changes from $30 to $36. Find the percentage increase.
Answer: 20%
- Change = 36 − 30 = 6
- 6 ÷ 30 × 100 = 20%
4.A price changes from $220 to $330. Find the percentage increase.
Answer: 50%
- Change = 330 − 220 = 110
- 110 ÷ 220 × 100 = 50%
5.A price changes from $120 to $90. Find the percentage decrease.
Answer: 25%
- Change = 120 − 90 = 30
- 30 ÷ 120 × 100 = 25%
6.A price changes from $240 to $288. Find the percentage increase.
Answer: 20%
- Change = 288 − 240 = 48
- 48 ÷ 240 × 100 = 20%
7.A price changes from $190 to $95. Find the percentage decrease.
Answer: 50%
- Change = 190 − 95 = 95
- 95 ÷ 190 × 100 = 50%
8.A price changes from $100 to $80. Find the percentage decrease.
Answer: 20%
- Change = 100 − 80 = 20
- 20 ÷ 100 × 100 = 20%
9.A price changes from $380 to $456. Find the percentage increase.
Answer: 20%
- Change = 456 − 380 = 76
- 76 ÷ 380 × 100 = 20%
10.A price changes from $160 to $176. Find the percentage increase.
Answer: 10%
- Change = 176 − 160 = 16
- 16 ÷ 160 × 100 = 10%
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