Percentage change
Compare signed percentage change and the symmetric percentage difference between values.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
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Your result
Complete the inputs to see your result.
How it works
- Percentage change = (New value − Original value) ÷ abs(Original value) × 100; Symmetric percentage difference = abs(New value − Original value) ÷ ((New value + Original value) ÷ 2) × 100; Symmetric percentage difference: Original value,New value ≥ 0
- Worked example: 80 → 100 = +25%; 100 → 80 = −20%; −80 → −60 = +25%
- Supported input limits: Original value: -1000000000000 ≤ x ≤ 1000000000000; New value: -1000000000000 ≤ x ≤ 1000000000000
Assumptions and limitations
Choose the mode and enter only its required values. Division by zero is rejected or shown as undefined. Integer bases and fractions retain exact integer arithmetic; rounded decimal displays do not replace it. List statistics describe the supplied observations only; weighted mode changes the mean, not the order statistics.
Sources
- OpenStax — percent definitions Sources reviewed: 2026-10-06
