How to find 80 percent of 10
"Percent" means per hundred, so 80% is the fraction 80/100, or 0.8 as a decimal. Taking 80 percent of 10 means multiplying 10 by that fraction:
80% of 10 = 10 x 80 / 100
= 800 / 100
= 8The same answer comes from the decimal form: 10 x 0.8 = 8. And because multiplication is commutative, 80% of 10 equals 10% of 80, 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 80% from those pieces: 8 x 1 = 8.
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 |
| 15% | 1.5 | 8.5 | 11.5 |
| 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 |
| 79% | 7.9 | 2.1 | 17.9 |
| 81% | 8.1 | 1.9 | 18.1 |
| 85% | 8.5 | 1.5 | 18.5 |
80 percent of other amounts
| Amount | 80% of it |
|---|---|
| 20 | 16 |
| 25 | 20 |
| 30 | 24 |
| 40 | 32 |
| 50 | 40 |
Where this comes up
A 80% discount on a 10 price takes off 8, leaving 2. A 80% tip or tax on 10 adds 8, for a total of 18. If 10 is a score out of a possible total, 80% of it is the share 8 represents. For percent change, reverse percentages, and "X is what percent of Y", use the full percentage calculator.