9th Grade Percentage of an Amount Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the 9th Grade percentages worksheet.
9th Grade Percentage of an Amount Worksheet — Level 3 — Answers
Show your work.
1.Find 22% of 210.
Answer: 46.2
- 22% = 0.22
- 0.22 × 210 = 46.2
2.Hunter's weekly pay of $140 increases by 2.5%. What is the new weekly pay?
Answer: $143.50
- Increase: 2.5% of 140 = 3.5
- 140 + 3.5 = 143.50
- (Or: 102.5% × 140 = 143.50)
3.Find 12% of 80.
Answer: 9.6
- 12% = 0.12
- 0.12 × 80 = 9.6
4.Layla's weekly pay of $420 increases by 45%. What is the new weekly pay?
Answer: $609.00
- Increase: 45% of 420 = 189
- 420 + 189 = 609.00
- (Or: 145% × 420 = 609.00)
5.Find 7% of 600.
Answer: 42
- 7% = 0.07
- 0.07 × 600 = 42
6.A jacket costs $310. It is reduced by 85% in a sale. What is the sale price?
Answer: $46.50
- Discount: 85% of 310 = 263.5
- 310 − 263.5 = 46.50
- (Or: 15% × 310 = 46.50)
7.Jack's weekly pay of $40 increases by 12%. What is the new weekly pay?
Answer: $44.80
- Increase: 12% of 40 = 4.8
- 40 + 4.8 = 44.80
- (Or: 112% × 40 = 44.80)
8.Find 2.5% of 520.
Answer: 13
- 2.5% = 0.025
- 0.025 × 520 = 13
9.Find 7% of 390.
Answer: 27.3
- 7% = 0.07
- 0.07 × 390 = 27.3
10.Hunter's weekly pay of $560 increases by 12%. What is the new weekly pay?
Answer: $627.20
- Increase: 12% of 560 = 67.2
- 560 + 67.2 = 627.20
- (Or: 112% × 560 = 627.20)
11.A jacket costs $180. It is reduced by 35% in a sale. What is the sale price?
Answer: $117.00
- Discount: 35% of 180 = 63
- 180 − 63 = 117.00
- (Or: 65% × 180 = 117.00)
12.A jacket costs $220. It is reduced by 2.5% in a sale. What is the sale price?
Answer: $214.50
- Discount: 2.5% of 220 = 5.5
- 220 − 5.5 = 214.50
- (Or: 97.5% × 220 = 214.50)
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.