What Is 9% of 20?
9% of 20 = 1.8
How to calculate 9% of 20
- Turn the percentage into a decimal by dividing by 100: 9 ÷ 100 = 0.09.
- Multiply by the number: 0.09 × 20 = 1.8.
X% of Y = X ÷ 100 × Y
Mental math shortcut
Find 10% by moving the decimal point one place left: 10% of 20 = 2. Then multiply by 0.9 to get 9%: 2 × 0.9 = 1.8.
Swap trick: x% of y = y% of x, so 9% of 20 is the same as 20% of 9, which is also 1.8.
Other percentages of 20
| 5% of 20 | 1 |
| 10% of 20 | 2 |
| 15% of 20 | 3 |
| 20% of 20 | 4 |
| 25% of 20 | 5 |
| 30% of 20 | 6 |
| 40% of 20 | 8 |
| 50% of 20 | 10 |
| 75% of 20 | 15 |
9% of other numbers
| 9% of 10 | 0.9 |
| 9% of 12 | 1.08 |
| 9% of 15 | 1.35 |
| 9% of 25 | 2.25 |
| 9% of 30 | 2.7 |
| 9% of 40 | 3.6 |
| 9% of 45 | 4.05 |
| 9% of 50 | 4.5 |
| 9% of 60 | 5.4 |
| 9% of 70 | 6.3 |
| 9% of 75 | 6.75 |
| 9% of 80 | 7.2 |
| 9% of 90 | 8.1 |
| 9% of 100 | 9 |
| 9% of 120 | 10.8 |
| 9% of 125 | 11.25 |
| 9% of 150 | 13.5 |
| 9% of 180 | 16.2 |
| 9% of 200 | 18 |
Frequently asked questions
What is 9% of 20?
9% of 20 is 1.8 (9 ÷ 100 × 20).
What is 20 plus 9%?
20 + 9% = 21.8.
What is 20 minus 9%?
20 − 9% = 18.2.
How do you calculate a percentage of a number?
Divide the percentage by 100 and multiply by the number: 15% of 80 = 0.15 × 80 = 12.
How do you find what percent one number is of another?
Divide the part by the whole and multiply by 100: 12 is 12 ÷ 80 × 100 = 15% of 80.