Percentage calculator
Percentage Difference Calculator
Percentage difference compares two values relative to their average. It is useful when neither value is treated as the original or baseline value.
Percentage difference
18.1818%
Symmetric percentage difference between the two values.
Formula
|A − B| / ((|A| + |B|) / 2) × 100Step-by-step calculation
- 1
Find the absolute difference between the two values.
- 2
Calculate the average of their absolute values.
- 3
Divide the difference by the average and multiply by 100.
Formula
|Value 1 − Value 2| ÷ ((|Value 1| + |Value 2|) ÷ 2) × 100
How to calculate it
- Find the absolute difference between the two values.
- Calculate the average of their absolute magnitudes.
- Divide the difference by that average and multiply by 100.
Comparing 40 and 50
Values: Difference = 10; average = 45.
Result: 10 ÷ 45 × 100 ≈ 22.22%.
Frequently asked questions
Is percentage difference the same as percentage change?
No. Percentage difference uses the average of the two values as its reference. Percentage change uses a specified starting value.
Does reversing the two values change the answer?
No. The absolute difference and average remain the same when the two values are reversed.
What happens when both values are zero?
The average is zero, so the formula has a zero denominator. Percentage difference is undefined for this pair.