Live calculation
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Percentage difference22.22%
The percentage difference between 80 and 100 is 22.22%.
Absolute difference20
Average magnitude90
Show calculation steps
- |80 − 100| = 20.
- Average = (|80| + |100|) ÷ 2 = 90.
- Difference ÷ average × 100 = 22.2222%.
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How this calculator works
Percentage difference = |A − B| ÷ ((|A| + |B|) ÷ 2) × 100
Percentage difference is best when two measurements are peers. If one value is explicitly old and the other is new, percentage change is usually the better calculation.
Example: 80 and 100
The absolute difference is 20 and the average is 90, so the percentage difference is 22.22%.
Frequently asked questions
Does order matter for percentage difference?
No. Swapping the two values produces the same percentage difference.
When should I use percentage change instead?
Use percentage change when one value is the starting or original value and the other is the ending value.