How to Calculate Reverse Percentage

Introduction

This guide explains how to calculate the original value before a percentage increase or decrease.

Steps to Calculate Reverse Percentage

  1. Enter the Final Value:
    Enter the value after the percentage change.

  2. Enter the Percentage Change:
    Enter the percentage that was added or subtracted.

  3. Select Increase or Decrease:
    Indicate whether the percentage was an increase or a decrease.

  4. Calculate the Original Value:
    The original value will be displayed automatically.

Formulas

If the percentage was an increase:

Original Value = Final Value / (1 + (Percentage / 100))

If the percentage was a decrease:

Original Value = Final Value / (1 - (Percentage / 100))

Example

If a value increased by 20% and is now 120, what was the original value?

Original Value = 120 / (1 + (20 / 100)) = 100

If a value decreased by 20% and is now 80, what was the original value?

Original Value = 80 / (1 - (20 / 100)) = 100

Calculate reverse percentage easily!

Use Percentage Calculator