How to find 20 percent of 20
"Percent" means per hundred, so 20% is the fraction 20/100, or 0.2 as a decimal. Taking 20 percent of 20 means multiplying 20 by that fraction:
20% of 20 = 20 x 20 / 100
= 400 / 100
= 4The same answer comes from the decimal form: 20 x 0.2 = 4. And because multiplication is commutative, 20% of 20 equals 20% of 20, 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 20% from those pieces: 2 x 2 = 4.
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 |
| 19% | 3.8 | 16.2 | 23.8 |
| 21% | 4.2 | 15.8 | 24.2 |
| 25% | 5 | 15 | 25 |
| 30% | 6 | 14 | 26 |
| 40% | 8 | 12 | 28 |
| 50% | 10 | 10 | 30 |
| 75% | 15 | 5 | 35 |
20 percent of other amounts
| Amount | 20% of it |
|---|---|
| 10 | 2 |
| 25 | 5 |
| 30 | 6 |
| 40 | 8 |
| 50 | 10 |
| 60 | 12 |
| 75 | 15 |
| 80 | 16 |
| 100 | 20 |
Where this comes up
A 20% discount on a 20 price takes off 4, leaving 16. A 20% tip or tax on 20 adds 4, for a total of 24. If 20 is a score out of a possible total, 20% of it is the share 4 represents. For percent change, reverse percentages, and "X is what percent of Y", use the full percentage calculator.