What is 20% off $100?
Price after 20% off
$80.00
You save $20.00
How it's calculated
- Find the discount: 20% of $100 = $100 × 0.2 = $20.00
- Subtract it from the price: $100 − $20.00 = $80.00
Shortcut: with 20% off you pay 80% of the price, so multiply $100 × 0.8 = $80.00 in one step.
Sales tax, if any, is usually added after the discount and isn't included here.