Percent Difference Calculator

Compare two values without treating either one as the original.

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How to calculate

Percent difference = |first − second| ÷ ((|first| + |second|) ÷ 2) × 100

The percent difference between 40 and 50 is about 22.22%.

Percent difference is symmetric. Use percentage change when one value is the original baseline.

Results display up to 8 decimal places; exported numbers preserve calculation precision. This is a calculation summary, not an official certificate.