How to find 15 percent of 20
"Percent" means per hundred, so 15% is the fraction 15/100, or 0.15 as a decimal. Taking 15 percent of 20 means multiplying 20 by that fraction:
15% of 20 = 20 x 15 / 100
= 300 / 100
= 3The same answer comes from the decimal form: 20 x 0.15 = 3. And because multiplication is commutative, 15% of 20 equals 20% of 15, which is sometimes the easier way to see it in your head.
Mental math shortcut
10% of 20 is 2 (move the decimal one place left), and 1% is 0.2. Build 15% from those pieces: 1 x 2 + 5 x 0.2 = 3.
Nearby percentages of 20
| Percent | Of 20 | 20 minus it | 20 plus it |
|---|---|---|---|
| 1% | 0.2 | 19.8 | 20.2 |
| 5% | 1 | 19 | 21 |
| 10% | 2 | 18 | 22 |
| 14% | 2.8 | 17.2 | 22.8 |
| 16% | 3.2 | 16.8 | 23.2 |
| 20% | 4 | 16 | 24 |
| 25% | 5 | 15 | 25 |
| 30% | 6 | 14 | 26 |
| 50% | 10 | 10 | 30 |
| 75% | 15 | 5 | 35 |
15 percent of other amounts
| Amount | 15% of it |
|---|---|
| 10 | 1.5 |
| 25 | 3.75 |
| 30 | 4.5 |
| 40 | 6 |
| 50 | 7.5 |
| 60 | 9 |
| 75 | 11.25 |
| 80 | 12 |
| 100 | 15 |
Where this comes up
A 15% discount on a 20 price takes off 3, leaving 17. A 15% tip or tax on 20 adds 3, for a total of 23. If 20 is a score out of a possible total, 15% of it is the share 3 represents. For percent change, reverse percentages, and "X is what percent of Y", use the full percentage calculator.