Enter the total decay and the original starting amount into the Calculator. The calculator will evaluate the Decay Percentage.

## Decay Percentage Formula

DP = TD / OA *100

Variables:

- DP is the Decay Percentage (%)
- TD is the total decay
- OA is the original starting amount

To calculate the Decay Percentage, divide the total decay amount by the original starting amount, then multiply by 100.

## How to Calculate Decay Percentage?

The following steps outline how to calculate the Decay Percentage.

- First, determine the total decay.
- Next, determine the original starting amount.
- Next, gather the formula from above = DP = TD / OA *100.
- Finally, calculate the Decay Percentage.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

total decay = 16

original starting amount = 80