Percentage Decrease Calculator
Calculate the percentage decrease from an original value to a new value. Useful for discounts, price drops, or any reduction scenario.
Published by:
isCalculator Editorial Team
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How to use this tool?
This calculator computes the percentage decrease from an original value to a new, lower value.
- Enter the Original Value (e.g., 100). This must be a positive number.
- Enter the New Value (e.g., 80). This must be less than the original value.
- Click “Calculate” or press Enter on your keyboard.
The result shows the percentage decrease and the formula used. For example, a drop from 100 to 80 gives a 20.00% decrease.
Note: The calculator only works for decreases. If the new value is greater than the original, an error will appear.
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Frequently Asked Questions
Percentage decrease measures the reduction from an original value to a new lower value, expressed as a percentage of the original.
Subtract the new value from the original, divide by the original, then multiply by 100.
No, for a decrease the new value must be less than the original. If you want an increase, use a percentage increase calculator.
