Year 8 Percentage Increase and Decrease Worksheet — Level 2 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 8 percentages worksheet.
Year 8 Percentage Increase and Decrease Worksheet — Level 2 — Practice Set 2 — Answers
Percentage change = change ÷ original amount × 100. Always divide by the original amount.
1.A price changes from $300 to $255. Find the percentage decrease.
Answer: 15%
- Change = 300 − 255 = 45
- 45 ÷ 300 × 100 = 15%
2.A price changes from $700 to $490. Find the percentage decrease.
Answer: 30%
- Change = 700 − 490 = 210
- 210 ÷ 700 × 100 = 30%
3.A price changes from $180 to $252. Find the percentage increase.
Answer: 40%
- Change = 252 − 180 = 72
- 72 ÷ 180 × 100 = 40%
4.A price changes from $800 to $600. Find the percentage decrease.
Answer: 25%
- Change = 800 − 600 = 200
- 200 ÷ 800 × 100 = 25%
5.A price changes from $240 to $168. Find the percentage decrease.
Answer: 30%
- Change = 240 − 168 = 72
- 72 ÷ 240 × 100 = 30%
6.A price changes from $240 to $96. Find the percentage decrease.
Answer: 60%
- Change = 240 − 96 = 144
- 144 ÷ 240 × 100 = 60%
7.A price changes from $660 to $726. Find the percentage increase.
Answer: 10%
- Change = 726 − 660 = 66
- 66 ÷ 660 × 100 = 10%
8.A price changes from $240 to $300. Find the percentage increase.
Answer: 25%
- Change = 300 − 240 = 60
- 60 ÷ 240 × 100 = 25%
9.A price changes from $440 to $308. Find the percentage decrease.
Answer: 30%
- Change = 440 − 308 = 132
- 132 ÷ 440 × 100 = 30%
10.A price changes from $580 to $667. Find the percentage increase.
Answer: 15%
- Change = 667 − 580 = 87
- 87 ÷ 580 × 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.