What is 40 percent of 20?
40% of 20 is 8.
40% of 20
8
How it is calculated
Formula: X% of Y = X ÷ 100 × Y
- Turn the percentage into a decimal: 40 ÷ 100 = 0.4.
- Multiply by the number: 0.4 × 20 = 8.
What this means
- Shortcut: 10% of 20 is 2 (move the decimal point one place left), and 40% is 4 times that: 8.
- Percentages are reversible: 40% of 20 equals 20% of 40, which is often easier to work out in your head.
- As a price: a 40% discount on $20 saves $8, so you pay $12; adding 40% instead (tax or a tip) makes it $28.
Try other numbers
The full percentage calculator, filled in with these values.
%
Formula: X% of Y = X ÷ 100 × Y
40% of 20 is
8
40 ÷ 100 × 20 = 8
| Percentage | Value |
|---|---|
| 1% | 0.2 |
| 5% | 1 |
| 10% | 2 |
| 15% | 3 |
| 20% | 4 |
| 25% | 5 |
| 50% | 10 |
| 75% | 15 |
Show the steps
- Turn the percentage into a decimal: 40 ÷ 100 = 0.4.
- Multiply by the number: 0.4 × 20 = 8.