Subtract one value from the other to find the difference
Take the absolute value of the difference
Divide the difference by the original or reference value
Multiply the result by 100
Use the formula: Percentage Difference = |A – B| / reference value × 100
If comparing two values equally, use the average of the two values as the reference: Percentage Difference = |A – B| / ((A + B) / 2) × 100