Percentage Decrease Calculator
Decrease a starting value by any percentage. Useful for discounts, reductions, depreciation estimates, and “minus X%” math.
Percentage Increase / Decrease
Increase or decrease a value by a percentage
Quick select
Result
Enter values to calculate
About this percentage decrease
Decrease a starting value by any percentage. Useful for discounts, reductions, depreciation estimates, and “minus X%” math.
Worked examples
| Question | Answer |
|---|---|
| 100 decreased by 15% | 85 |
| 200 decreased by 10% | 180 |
| 80 decreased by 25% | 60 |
Formula
| Goal | Formula |
|---|---|
| Value after decrease | value × (1 − percent/100) |
FAQ
- How do you calculate a percentage decrease?
- New value = original × (1 − percent/100). 100 decreased by 15% = 85. Savings = original − new value.
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