What Is 9% of 10?
9% of 10 = 0.9
How to calculate 9% of 10
- Turn the percentage into a decimal by dividing by 100: 9 ÷ 100 = 0.09.
- Multiply by the number: 0.09 × 10 = 0.9.
X% of Y = X ÷ 100 × Y
Mental math shortcut
Find 10% by moving the decimal point one place left: 10% of 10 = 1. Then multiply by 0.9 to get 9%: 1 × 0.9 = 0.9.
Swap trick: x% of y = y% of x, so 9% of 10 is the same as 10% of 9, which is also 0.9.
Other percentages of 10
| 5% of 10 | 0.5 |
| 10% of 10 | 1 |
| 15% of 10 | 1.5 |
| 20% of 10 | 2 |
| 25% of 10 | 2.5 |
| 30% of 10 | 3 |
| 40% of 10 | 4 |
| 50% of 10 | 5 |
| 75% of 10 | 7.5 |
9% of other numbers
| 9% of 12 | 1.08 |
| 9% of 15 | 1.35 |
| 9% of 20 | 1.8 |
| 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 |
Frequently asked questions
What is 9% of 10?
9% of 10 is 0.9 (9 ÷ 100 × 10).
What is 10 plus 9%?
10 + 9% = 10.9.
What is 10 minus 9%?
10 − 9% = 9.1.
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.