How to Calculate Percentage Decrease

This guide provides a step-by-step guide on how to calculate percentage decrease. It includes a formula and an example with detailed calculations.

Calculate Percentage Increase

To find the percentage decrease, subtract the final value from the initial value, divide the difference by the initial value, and then multiply by 100%.

Percentage Decrease Formula

Percent Decrease = ((Initial Value – Final Value) / Initial Value) * 100%


  1. Initial Value = 100
  2. Final Value = 80
  3. Subtract Final Value from Initial Value: 100 – 80 = 20
  4. Divide the Difference by Initial Value: 20 / 100 = 0.2
  5. Multiply by 100%: 0.2 * 100% = 20%

So, the percentage decrease is 20%.

Percentage Increase Calculator

To calculate percentage decrease, go to Percentage increase decrease calculator. Enter initial value in “from” input field and final value in “to” input field. Calculator automatically display percent decrease value.

Check out helpful percentage calculators: Calculators, Percentage Calculator

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