How to find 15 percent of 10
"Percent" means per hundred, so 15% is the fraction 15/100, or 0.15 as a decimal. Taking 15 percent of 10 means multiplying 10 by that fraction:
15% of 10 = 10 x 15 / 100
= 150 / 100
= 1.5The same answer comes from the decimal form: 10 x 0.15 = 1.5. And because multiplication is commutative, 15% of 10 equals 10% of 15, which is sometimes the easier way to see it in your head.
Mental math shortcut
10% of 10 is 1 (move the decimal one place left), and 1% is 0.1. Build 15% from those pieces: 1 x 1 + 5 x 0.1 = 1.5.
Nearby percentages of 10
| Percent | Of 10 | 10 minus it | 10 plus it |
|---|---|---|---|
| 1% | 0.1 | 9.9 | 10.1 |
| 5% | 0.5 | 9.5 | 10.5 |
| 10% | 1 | 9 | 11 |
| 14% | 1.4 | 8.6 | 11.4 |
| 16% | 1.6 | 8.4 | 11.6 |
| 20% | 2 | 8 | 12 |
| 25% | 2.5 | 7.5 | 12.5 |
| 30% | 3 | 7 | 13 |
| 50% | 5 | 5 | 15 |
| 75% | 7.5 | 2.5 | 17.5 |
15 percent of other amounts
| Amount | 15% of it |
|---|---|
| 20 | 3 |
| 25 | 3.75 |
| 30 | 4.5 |
| 40 | 6 |
| 50 | 7.5 |
Where this comes up
A 15% discount on a 10 price takes off 1.5, leaving 8.5. A 15% tip or tax on 10 adds 1.5, for a total of 11.5. If 10 is a score out of a possible total, 15% of it is the share 1.5 represents. For percent change, reverse percentages, and "X is what percent of Y", use the full percentage calculator.