What is 20 percent of 40?
20% of 40 is 8.
20% of 40
8
How it is calculated
Formula: X% of Y = X ÷ 100 × Y
- Turn the percentage into a decimal: 20 ÷ 100 = 0.2.
- Multiply by the number: 0.2 × 40 = 8.
What this means
- Shortcut: 20% is 1/5, so divide 40 by 5: 40 ÷ 5 = 8.
- As a price: a 20% discount on $40 saves $8, so you pay $32; adding 20% instead (tax or a tip) makes it $48.
Try other numbers
The full percentage calculator, filled in with these values.
%
Formula: X% of Y = X ÷ 100 × Y
20% of 40 is
8
20 ÷ 100 × 40 = 8
| Percentage | Value |
|---|---|
| 1% | 0.4 |
| 5% | 2 |
| 10% | 4 |
| 15% | 6 |
| 20% | 8 |
| 25% | 10 |
| 50% | 20 |
| 75% | 30 |
Show the steps
- Turn the percentage into a decimal: 20 ÷ 100 = 0.2.
- Multiply by the number: 0.2 × 40 = 8.