A price rises from $40 to $50. Find the percent increase.
- The increase is 50 − 40 = 10.
- 10 ÷ 40 = 0.25; multiply by 100%.
Answer: 25% increase
Percent Change Worksheets
Calculate percent increase and decrease using the original amount as the denominator.
Learn the skill
Calculating percent increase and decrease
Percent change compares a change to the original amount. Divide the size of the change by the original value, then multiply by 100%. State whether the amount increased or decreased.
A method you can use
- Find the original and new amounts; subtract to find the size of the change.
- Divide the change by the original amount, not the new amount.
- Convert the decimal to a percent and name its direction. This formula requires a nonzero original amount.
Worked examples
A population falls from 80 to 60. Find the percent decrease.
- The decrease is 80 − 60 = 20.
- 20 ÷ 80 = 0.25.
Answer: 25% decrease
A $60 item is discounted by 15%. Find its sale price.
- The discount is 0.15 × 60 = 9 dollars.
- Subtract the discount: 60 − 9.
Answer: $51
Try it yourself
Solve these before opening the answers. The printable sets below give you more practice.
1. A value rises from 30 to 36. Find the percent increase.
Show answer and explanation
20%
The increase is 6; 6/30 × 100% = 20%.
2. An $80 item is reduced by 10%. Find the new price.
Show answer and explanation
$72
The reduction is $8; 80 − 8 = 72.
Before you begin
Multiply, divide and simplify fractions. Read quantities with their units.
Choose your level
- Easy: Use whole-number rates and small factors.
- Medium: Find missing values in equivalent ratios.
- Hard: Use two steps or reverse a relationship.
Questions and answer calculations checked on 2026-09-17. How we check worksheets. Free for personal and classroom use.
Preview and print an easy set
Try six questions below, or choose a full set at your level.
1
A price changes from $60 to $66. What is the percent increase?
2
A price changes from $110 to $93.5. What is the percent decrease?
3
A price changes from $20 to $22. What is the percent increase?
4
A price changes from $160 to $136. What is the percent decrease?
5
A price changes from $20 to $23. What is the percent increase?
6
A price changes from $60 to $54. What is the percent decrease?
Answer Key
1. 10 %2. 15 %3. 10 %4. 15 %5. 15 %6. 10 %