As the name suggests, a reverse percentages calculator is a tool that helps you calculate percentages in reverse. This means that instead of figuring out what percentage a particular value represents, you use this tool to calculate the original value given a percentage and a final amount. For instance, if you know the final price of a discounted item and the discount percentage, you can use it to determine the original price before the sale with The Percentage Calculator.
Reverse percentage formula
- O represents the Original Amount
- F represents the Final Amount
- P represents the Percentage change
For example, using the previous example of a final bill of $120 after a 20% discount, we can calculate the original price as follows:
Original Amount = $120 / (1 – 0.20) = $150
Therefore, the original price of the item before the 20% discount was $150.