Enter the rate of decay (%) into the Calculator. The calculator will evaluate the Decay Factor.

## Decay Factor Formula

DF = 1-DR/100

Variables:

- DF is the Decay Factor ()
- DR is the rate of decay (%)

To calculate Decay Factor, subtract the result of the rate of decay over 100 from 1.

## How to Calculate the Decay Factor?

The following steps outline how to calculate the Decay Factor.

- First, determine the rate of decay (%).
- Next, gather the formula from above = DF = 1-DR/100.
- Finally, calculate the Decay Factor.
- 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.

rate of decay (%) = 25