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Percentage change
Percentage Decrease Calculator
Reduce a starting value by a selected percentage and see the reduction and remaining value.
Enter your values
Result
Detailed breakdown
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Your result will appear here
Complete the fields and select Calculate to see a detailed answer.
Formula
How it is calculated
New Value = Original Value × (1 − Decrease ÷ 100)
Frequently asked questions
How do I calculate a percentage decrease?
Multiply the original value by the percentage rate and subtract that amount from the original.
Can a decrease exceed 100%?
For normal reductions, no. A decrease above 100% would produce a negative result, so this calculator limits the rate to 100%.
Is percentage decrease reversible?
Not with the same percentage. A 20% decrease needs a 25% increase to return to the starting value.