Percentage change
Compare signed percentage change and the symmetric percentage difference between values. Drag the graph handles to change inputs and explore the result.
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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How it works
- Percentage change = ( − ) ÷ abs() × 100; Symmetric percentage difference = abs( − ) ÷ (( + ) ÷ 2) × 100; Symmetric percentage difference: , ≥ 0
- Worked example: 80 → 100 = +25%; 100 → 80 = −20%; −80 → −60 = +25%
- Supported input limits: : -1,000,000,000,000 ≤ x ≤ 1,000,000,000,000; : -1,000,000,000,000 ≤ x ≤ 1,000,000,000,000
Input and formula key
Your result
Complete the inputs to see your result.
Assumptions and limitations
Change divides the signed difference by the absolute original value; a zero baseline is undefined. Symmetric difference accepts nonnegative values and divides the absolute difference by their average. These two measures answer different questions.
Sources
- OpenStax — percent definitions Sources reviewed: 2026-10-06
