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Percentage Calculators

Percentage Decrease Calculator

Calculate the percent decrease from an original value to a new value, or reduce a number by a percentage.

Enter values

Results update as you type.

Result

Percentage decrease

25%

Absolute change
30
Step-by-stepShow
  1. (120 − 90) ÷ 120 × 100 = 25%

About the Percentage Decrease Calculator

Calculate the percent decrease from an original value to a new value, or reduce a number by a percentage.

Also known as: percent decrease, decrease by percentage, percent reduction, subtract percentage.

How to use this calculator

  1. Enter calculate and the other fields.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Open “Step-by-step” to see how the answer was worked out.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

Decrease % = (Original − New) ÷ Original × 100

Worked example

Using the values pre-filled in the calculator above:

  • Calculate: Percent decrease from A to B
  • Original value (A) = 120
  • New value (B) = 90

the calculator returns:

  • Percentage decrease: 25%
  • Absolute change: 30

Working

  1. (120 − 90) ÷ 120 × 100 = 25%