Percentage calculators

What is 20% off 100?

How to calculate it

100 × (1 − 20 ÷ 100) = 80

1. Divide the discount, 20, by 100.
2. Subtract that fraction from 1 to find the portion of the price you pay.
3. Multiply by the original price, 100, to get 80.

This is the price after the discount, excluding taxes and shipping. Currency-specific rounding may change the final amount charged.

More worked examples

• What is 5% of 430?
• What is 20% of 150?
• What is the percentage change from 80 to 100?
• What was the original price before 20% off, if the sale price is 80?