10th Grade Percentage Increase and Decrease Worksheet — Level 1 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 10th Grade percentages worksheet.
Success TutoringWorksheetsAnswer sheet10th Grade · Mathematics · Percentages10th Grade 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 $260 to $390. Find the percentage increase.
Answer: 50%
- Change = 390 − 260 = 130
- 130 ÷ 260 × 100 = 50%
2.A price changes from $310 to $155. Find the percentage decrease.
Answer: 50%
- Change = 310 − 155 = 155
- 155 ÷ 310 × 100 = 50%
3.A price changes from $220 to $165. Find the percentage decrease.
Answer: 25%
- Change = 220 − 165 = 55
- 55 ÷ 220 × 100 = 25%
4.A price changes from $320 to $240. Find the percentage decrease.
Answer: 25%
- Change = 320 − 240 = 80
- 80 ÷ 320 × 100 = 25%
5.A price changes from $210 to $252. Find the percentage increase.
Answer: 20%
- Change = 252 − 210 = 42
- 42 ÷ 210 × 100 = 20%
6.A price changes from $360 to $540. Find the percentage increase.
Answer: 50%
- Change = 540 − 360 = 180
- 180 ÷ 360 × 100 = 50%
7.A price changes from $400 to $320. Find the percentage decrease.
Answer: 20%
- Change = 400 − 320 = 80
- 80 ÷ 400 × 100 = 20%
8.A price changes from $110 to $165. Find the percentage increase.
Answer: 50%
- Change = 165 − 110 = 55
- 55 ÷ 110 × 100 = 50%
9.A price changes from $170 to $85. Find the percentage decrease.
Answer: 50%
- Change = 170 − 85 = 85
- 85 ÷ 170 × 100 = 50%
10.A price changes from $360 to $288. Find the percentage decrease.
Answer: 20%
- Change = 360 − 288 = 72
- 72 ÷ 360 × 100 = 20%
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.