Percentage Difference
Compares two values with no "before/after" direction — useful when neither number is the original.
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Difference vs. change — what's the distinction?
Percentage change assumes one number is the "before" and one is the "after" — direction matters. Percentage difference treats both numbers as equals with no direction, useful when comparing two independent measurements rather than tracking one value over time.
% difference = (|A − B| ÷ ((A + B) ÷ 2)) × 100