Reverse Percentage Calculator

The Reverse Percentage Calculator determines the original value before a percentage increase or decrease was applied, given the final value and the percentage change .

Reverse Percent Calculator
Answer

 

Working Out

The problem we are solving is:

1% of ? is 1.

So 1% of ? = 1 ÷ 1 = 1.00.

So the original number is 100.00.

Answer: 1% of 100.00 = 1.


Key Formula

The calculator uses the following formula:Original Value=(1+100Percentage​)Final Value​

Steps to Solve

  1. Input the Percentage (%) :
    • Enter the percentage increase (e.g., 20 for 20%).
  2. Input the Final Value :
    • Provide the final value after the percentage increase (e.g., 120).
  3. Calculate the Original Value :
    • The calculator divides the final value by (1 + Percentage/100) to find the original value.
  4. Adjust Accuracy :
    • You can choose how precise the result should be (e.g., nearest whole number, 2 decimal places, etc.).

Example

  • Inputs :
    • Percentage: 20
    • Final Value: 120
  • Calculation :Original Value=1+10020​120​=1.2120​=100
  • Result :
    • The original value is 100.

Use Cases

  • Finding the original price of an item after a discount or tax.
  • Determining the starting amount in financial growth scenarios.
  • Reversing percentage-based adjustments in data analysis.

This tool simplifies reverse percentage calculations, saving time and ensuring accuracy!