How to find 15 percent of 80
"Percent" means per hundred, so 15% is the fraction 15/100, or 0.15 as a decimal. Taking 15 percent of 80 means multiplying 80 by that fraction:
15% of 80 = 80 x 15 / 100
= 1,200 / 100
= 12The same answer comes from the decimal form: 80 x 0.15 = 12. And because multiplication is commutative, 15% of 80 equals 80% of 15, which is sometimes the easier way to see it in your head.
Mental math shortcut
10% of 80 is 8 (move the decimal one place left), and 1% is 0.8. Build 15% from those pieces: 1 x 8 + 5 x 0.8 = 12.
Nearby percentages of 80
| Percent | Of 80 | 80 minus it | 80 plus it |
|---|---|---|---|
| 1% | 0.8 | 79.2 | 80.8 |
| 5% | 4 | 76 | 84 |
| 10% | 8 | 72 | 88 |
| 14% | 11.2 | 68.8 | 91.2 |
| 16% | 12.8 | 67.2 | 92.8 |
| 20% | 16 | 64 | 96 |
| 25% | 20 | 60 | 100 |
| 30% | 24 | 56 | 104 |
| 50% | 40 | 40 | 120 |
| 75% | 60 | 20 | 140 |
15 percent of other amounts
| Amount | 15% of it |
|---|---|
| 20 | 3 |
| 25 | 3.75 |
| 30 | 4.5 |
| 40 | 6 |
| 50 | 7.5 |
| 60 | 9 |
| 75 | 11.25 |
| 100 | 15 |
| 120 | 18 |
| 150 | 22.5 |
Where this comes up
A 15% discount on a 80 price takes off 12, leaving 68. A 15% tip or tax on 80 adds 12, for a total of 92. If 80 is a score out of a possible total, 15% of it is the share 12 represents. For percent change, reverse percentages, and "X is what percent of Y", use the full percentage calculator.