Year 8 Percentage Increase and Decrease Worksheet — Level 2 — Practice Set 4 — Answers
Answer sheet with worked solutions for the Year 8 percentages worksheet.
Year 8 Percentage Increase and Decrease Worksheet — Level 2 — Practice Set 4 — Answers
Percentage change = change ÷ original amount × 100. Always divide by the original amount.
1.A price changes from $360 to $270. Find the percentage decrease.
Answer: 25%
- Change = 360 − 270 = 90
- 90 ÷ 360 × 100 = 25%
2.A price changes from $660 to $264. Find the percentage decrease.
Answer: 60%
- Change = 660 − 264 = 396
- 396 ÷ 660 × 100 = 60%
3.A price changes from $800 to $840. Find the percentage increase.
Answer: 5%
- Change = 840 − 800 = 40
- 40 ÷ 800 × 100 = 5%
4.A price changes from $80 to $32. Find the percentage decrease.
Answer: 60%
- Change = 80 − 32 = 48
- 48 ÷ 80 × 100 = 60%
5.A price changes from $180 to $234. Find the percentage increase.
Answer: 30%
- Change = 234 − 180 = 54
- 54 ÷ 180 × 100 = 30%
6.A price changes from $120 to $102. Find the percentage decrease.
Answer: 15%
- Change = 120 − 102 = 18
- 18 ÷ 120 × 100 = 15%
7.A price changes from $740 to $777. Find the percentage increase.
Answer: 5%
- Change = 777 − 740 = 37
- 37 ÷ 740 × 100 = 5%
8.A price changes from $440 to $176. Find the percentage decrease.
Answer: 60%
- Change = 440 − 176 = 264
- 264 ÷ 440 × 100 = 60%
9.A price changes from $460 to $575. Find the percentage increase.
Answer: 25%
- Change = 575 − 460 = 115
- 115 ÷ 460 × 100 = 25%
10.A price changes from $420 to $378. Find the percentage decrease.
Answer: 10%
- Change = 420 − 378 = 42
- 42 ÷ 420 × 100 = 10%
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.