How it works
The price is multiplied by 1 minus the discount expressed as a decimal, so a 25% discount multiplies by 0.75. The amount saved is the difference between the original and sale price.
Formula: Sale price = price × (1 − discount ÷ 100)
Examples
A quarter off
80 with a 25% discount has a sale price of 80 × 0.75 = 60, saving 20.
Things to keep in mind
- The discount percentage must be between 0 and 100. A discount cannot exceed the full price, and a negative discount is a markup, not a discount — see the Markup Calculator for that.
- The price cannot be negative.