Explanation

How to determine the percentage difference between two prices for an item?

It can be determined using a simple formula:

The difference relative to the first cost (a) is:

c = (b-a) / a * 100, where

  • c — percentage difference
  • a — first cost (price)
  • b — second cost (price)

This difference denotes by what percentage the second value (b) is more (or less, if the sign is «-») relative to the first value (a).

The difference relative to the second cost (b) is:

c = (a-b) / b * 100, where

  • c — percentage difference
  • a — first cost (price)
  • b — second cost (price)

This difference denotes by what percentage the first value (a) is more (or less, if the sign is «-») relative to the second value (b).