- What is the difference between percentage difference and percentage change?
- Percentage change requires a designated starting baseline (before vs after), meaning switching the order changes the result. Percentage difference compares two numbers without chronological order by dividing by their average, so comparing A to B gives the exact same result as B to A.
- Why does percentage difference divide by the average?
- Dividing by the average ((A + B) / 2) creates a neutral, unbiased reference point when neither number can be considered the original starting value.