Year 8 Percentage Increase and Decrease Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 8 percentages worksheet.
Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · PercentagesYear 8 Percentage Increase and Decrease Worksheet — Level 2 — Practice Set 3 — Answers
Percentage change = change ÷ original amount × 100. Always divide by the original amount.
1.A price changes from $100 to $130. Find the percentage increase.
Answer: 30%
- Change = 130 − 100 = 30
- 30 ÷ 100 × 100 = 30%
2.A price changes from $360 to $432. Find the percentage increase.
Answer: 20%
- Change = 432 − 360 = 72
- 72 ÷ 360 × 100 = 20%
3.A price changes from $140 to $175. Find the percentage increase.
Answer: 25%
- Change = 175 − 140 = 35
- 35 ÷ 140 × 100 = 25%
4.A price changes from $180 to $234. Find the percentage increase.
Answer: 30%
- Change = 234 − 180 = 54
- 54 ÷ 180 × 100 = 30%
5.A price changes from $340 to $204. Find the percentage decrease.
Answer: 40%
- Change = 340 − 204 = 136
- 136 ÷ 340 × 100 = 40%
6.A price changes from $700 to $280. Find the percentage decrease.
Answer: 60%
- Change = 700 − 280 = 420
- 420 ÷ 700 × 100 = 60%
7.A price changes from $60 to $105. Find the percentage increase.
Answer: 75%
- Change = 105 − 60 = 45
- 45 ÷ 60 × 100 = 75%
8.A price changes from $460 to $506. Find the percentage increase.
Answer: 10%
- Change = 506 − 460 = 46
- 46 ÷ 460 × 100 = 10%
9.A price changes from $180 to $252. Find the percentage increase.
Answer: 40%
- Change = 252 − 180 = 72
- 72 ÷ 180 × 100 = 40%
10.A price changes from $560 to $476. Find the percentage decrease.
Answer: 15%
- Change = 560 − 476 = 84
- 84 ÷ 560 × 100 = 15%
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.