8th Grade Percentage Increase and Decrease Worksheet — Level 2 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 8th Grade percentages worksheet.
Success TutoringWorksheetsAnswer sheet8th Grade · Mathematics · Percentages8th Grade 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 $500 to $575. Find the percentage increase.
Answer: 15%
- Change = 575 − 500 = 75
- 75 ÷ 500 × 100 = 15%
2.A price changes from $180 to $288. Find the percentage increase.
Answer: 60%
- Change = 288 − 180 = 108
- 108 ÷ 180 × 100 = 60%
3.A price changes from $300 to $480. Find the percentage increase.
Answer: 60%
- Change = 480 − 300 = 180
- 180 ÷ 300 × 100 = 60%
4.A price changes from $100 to $80. Find the percentage decrease.
Answer: 20%
- Change = 100 − 80 = 20
- 20 ÷ 100 × 100 = 20%
5.A price changes from $300 to $360. Find the percentage increase.
Answer: 20%
- Change = 360 − 300 = 60
- 60 ÷ 300 × 100 = 20%
6.A price changes from $40 to $42. Find the percentage increase.
Answer: 5%
- Change = 42 − 40 = 2
- 2 ÷ 40 × 100 = 5%
7.A price changes from $660 to $462. Find the percentage decrease.
Answer: 30%
- Change = 660 − 462 = 198
- 198 ÷ 660 × 100 = 30%
8.A price changes from $540 to $405. Find the percentage decrease.
Answer: 25%
- Change = 540 − 405 = 135
- 135 ÷ 540 × 100 = 25%
9.A price changes from $720 to $864. Find the percentage increase.
Answer: 20%
- Change = 864 − 720 = 144
- 144 ÷ 720 × 100 = 20%
10.A price changes from $340 to $357. Find the percentage increase.
Answer: 5%
- Change = 357 − 340 = 17
- 17 ÷ 340 × 100 = 5%
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.
Great work. Here's what to try next: