Math & Percentage

Percentage Difference Calculator

Compare two numbers against their average to find the percentage difference without directional bias.

Math

Percentage Difference Calculator

Calculate the relative percentage difference between two values compared to their average.

Percentage Difference
%40.00
Absolute Difference (|V₁ - V₂|) 5
Average of Values ((V₁ + V₂) / 2) 12.5
Calculation Steps
(|10 - 15| / ((10 + 15) / 2)) × 100 = (5 / 12.5) × 100 = 40%

Percentage Difference Calculator Guide

The percentage difference is used when comparing two values of the same type where neither value is an initial or reference value. Unlike percentage change, the order of values does not matter.

Mathematical Formula

Percentage Difference=∣V1−V2∣V1+V22×100%\text{Percentage Difference} = \frac{|V_1 - V_2|}{\frac{V_1 + V_2}{2}} \times 100\%

Where:

  • ∣V1−V2∣|V_1 - V_2| is the absolute difference between the numbers.
  • V1+V22\frac{V_1 + V_2}{2} is the average (mean) of the two numbers.

Difference vs. Percentage Change

  • Percentage Change: Used when there is an “old” and “new” value (e.g. last year’s sales vs. this year’s sales). The denominator is V1V_1.
  • Percentage Difference: Used when comparing two peer values without chronological order (e.g. price of product A vs. price of product B). The denominator is the average V1+V22\frac{V_1 + V_2}{2}.