Percent difference is calculated as the difference between two values, divided by the average of the two values, expressed in terms of percentage.
Formula:
%Difference = (Value A – Value B) / (Value A + Value B) / 2 x 100
Using Absolute Values
While calculating the percent difference, always use absolute values, i.e. ignore the minus sign before any of the values. For example, a subtraction of 5 minus 10 gives -5. But the absolute value would be taken as 5, without any minus sign.
