Enter two different values into the calculator to determine the percentage difference.

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## Percentage Difference Formula

The following equation is used to calculate the percentage difference between to values.

%D = | X – Y | / [(X+Y)/2]

- Where %D is the percentage difference
- X is one of the values
- Y is the other numerical value

## Percentage Difference Definition

A percentage difference is the ratio of the difference between two numbers to the average of those two numbers.

## Percentage Difference Example

How to calculate percentage difference?

**First, determine your values X and Y.**Determine the two values you wish to calculate the percentage difference of.

**Next, calculate the average.**Calculate the average of the two values.

**Finally, calculate the percentage difference.**Divide the absolute value of X-Y by the average calculated in step 2 and multiply the result by 100. This will yield the percentage difference.

## FAQ

**What is a percentage difference?**

A percentage difference is considered the ratio of the absolute value of the difference between values divided by the average of the values and presented as a percent.