# Reverse Percent (%) Calculator

## How to Calculate Reverse Tip Percentage

__Step1__ : Convert Percentage to Decimal

Divide the percentage added to the original by 100.

**For example**, if a tip 6 percent was added to the bill to make it $115, work out 15 ÷ 100 = 0.15.

__Step2__ : Add 1 to Decimal

Add 1 to the percentage expressed as a decimal. In this example,work out 1 + 0.15 = 1.15.

__Step3__ : Divide Final Bill Amount by Decimal

Divide the final bill amount by the decimal to find the original amount before the percentage was added. In this example, work out 115 ÷ 1.15 = 100.

The amount before the Tip% was added is $100.

__Step4__ : Subtract Original Amount From Final Bill Amount

Subtract the original amount from the final bill amount to find the amount added.

In this example, work out 115 − 100 = 15. You now know that $15 was added as Tip%.