Let's solve each problem step by step using the formula for
percentage change:
$$
\text{Percentage Change} = \left( \frac{\text{New Amount} - \text{Original Amount}}{\text{Original Amount}} \right) \times 100\%
$$
We'll determine whether it's an
increase (if new > original) or
decrease (if new < original), then compute the percentage.
---
1. Original: 600 → New: 498
- Decrease: $600 - 498 = 102$
- Percentage: $\frac{102}{600} \times 100 = 17\%$
✔ Decrease of 17%
---
2. Original: 220 → New: 253
- Increase: $253 - 220 = 33$
- Percentage: $\frac{33}{220} \times 100 = 15\%$
✔ Increase of 15%
---
3. Original: 500 → New: 555
- Increase: $555 - 500 = 55$
- Percentage: $\frac{55}{500} \times 100 = 11\%$
✔ Increase of 11%
---
4. Original: 670 → New: 603
- Decrease: $670 - 603 = 67$
- Percentage: $\frac{67}{670} \times 100 \approx 10\%$
✔ Decrease of 10%
---
5. Original: 300 → New: 258
- Decrease: $300 - 258 = 42$
- Percentage: $\frac{42}{300} \times 100 = 14\%$
✔ Decrease of 14%
---
6. Original: 500 → New: 435
- Decrease: $500 - 435 = 65$
- Percentage: $\frac{65}{500} \times 100 = 13\%$
✔ Decrease of 13%
---
7. Original: 600 → New: 642
- Increase: $642 - 600 = 42$
- Percentage: $\frac{42}{600} \times 100 = 7\%$
✔ Increase of 7%
---
8. Original: 600 → New: 618
- Increase: $618 - 600 = 18$
- Percentage: $\frac{18}{600} \times 100 = 3\%$
✔ Increase of 3%
---
9. Original: 675 → New: 729
- Increase: $729 - 675 = 54$
- Percentage: $\frac{54}{675} \times 100 = 8\%$
✔ Increase of 8%
---
10. Original: 935 → New: 748
- Decrease: $935 - 748 = 187$
- Percentage: $\frac{187}{935} \times 100 = 20\%$
✔ Decrease of 20%
---
✔ Final Answers:
| # | Original | New | Change | % Change |
|---|--------|-----|--------|----------|
| 1 | 600 | 498 | ↓ |
-17% |
| 2 | 220 | 253 | ↑ |
+15% |
| 3 | 500 | 555 | ↑ |
+11% |
| 4 | 670 | 603 | ↓ |
-10% |
| 5 | 300 | 258 | ↓ |
-14% |
| 6 | 500 | 435 | ↓ |
-13% |
| 7 | 600 | 642 | ↑ |
+7% |
| 8 | 600 | 618 | ↑ |
+3% |
| 9 | 675 | 729 | ↑ |
+8% |
|10 | 935 | 748 | ↓ |
-20% |
> 💡
Note: Negative percentages mean decrease, positive means increase.
Let me know if you'd like this formatted as a printable table!
Parent Tip: Review the logic above to help your child master the concept of percent increase or decrease worksheet.
