How to find 80 percent of 20
"Percent" means per hundred, so 80% is the fraction 80/100, or 0.8 as a decimal. Taking 80 percent of 20 means multiplying 20 by that fraction:
80% of 20 = 20 x 80 / 100
= 1,600 / 100
= 16The same answer comes from the decimal form: 20 x 0.8 = 16. And because multiplication is commutative, 80% of 20 equals 20% of 80, 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 80% from those pieces: 8 x 2 = 16.
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 |
| 15% | 3 | 17 | 23 |
| 20% | 4 | 16 | 24 |
| 25% | 5 | 15 | 25 |
| 30% | 6 | 14 | 26 |
| 50% | 10 | 10 | 30 |
| 75% | 15 | 5 | 35 |
| 79% | 15.8 | 4.2 | 35.8 |
| 81% | 16.2 | 3.8 | 36.2 |
| 85% | 17 | 3 | 37 |
80 percent of other amounts
| Amount | 80% of it |
|---|---|
| 10 | 8 |
| 25 | 20 |
| 30 | 24 |
| 40 | 32 |
| 50 | 40 |
| 60 | 48 |
| 75 | 60 |
| 80 | 64 |
| 100 | 80 |
Where this comes up
A 80% discount on a 20 price takes off 16, leaving 4. A 80% tip or tax on 20 adds 16, for a total of 36. If 20 is a score out of a possible total, 80% of it is the share 16 represents. For percent change, reverse percentages, and "X is what percent of Y", use the full percentage calculator.