CALCULATOR
Percentage Difference Calculator
Percentage Difference. Example: First quantity: 80, Second quantity: 100 gives 22.2222222222 %. Compare two positive quantities without designating an original. Uses their arithmetic mean as denominator; swapping inputs preserves the result. Zero pairs and signed quantities are outside this declared domain.
How the calculation works
100 × abs(a − b) / ((a + b) / 2)
Worked example
With first quantity 1 units, second quantity 1 units, percentage result is 0 %.
Assumptions and limits
Compare two positive quantities without designating an original. Uses their arithmetic mean as denominator; swapping inputs preserves the result. Zero pairs and signed quantities are outside this declared domain.