How to find 20 percent of 30
"Percent" means per hundred, so 20% is the fraction 20/100, or 0.2 as a decimal. Taking 20 percent of 30 means multiplying 30 by that fraction:
20% of 30 = 30 x 20 / 100
= 600 / 100
= 6The same answer comes from the decimal form: 30 x 0.2 = 6. And because multiplication is commutative, 20% of 30 equals 30% of 20, which is sometimes the easier way to see it in your head.
Mental math shortcut
10% of 30 is 3 (move the decimal one place left), and 1% is 0.3. Build 20% from those pieces: 2 x 3 = 6.
Nearby percentages of 30
| Percent | Of 30 | 30 minus it | 30 plus it |
|---|---|---|---|
| 1% | 0.3 | 29.7 | 30.3 |
| 5% | 1.5 | 28.5 | 31.5 |
| 10% | 3 | 27 | 33 |
| 15% | 4.5 | 25.5 | 34.5 |
| 19% | 5.7 | 24.3 | 35.7 |
| 21% | 6.3 | 23.7 | 36.3 |
| 25% | 7.5 | 22.5 | 37.5 |
| 30% | 9 | 21 | 39 |
| 40% | 12 | 18 | 42 |
| 50% | 15 | 15 | 45 |
| 75% | 22.5 | 7.5 | 52.5 |
20 percent of other amounts
| Amount | 20% of it |
|---|---|
| 10 | 2 |
| 20 | 4 |
| 25 | 5 |
| 40 | 8 |
| 50 | 10 |
| 60 | 12 |
| 75 | 15 |
| 80 | 16 |
| 100 | 20 |
| 120 | 24 |
Where this comes up
A 20% discount on a 30 price takes off 6, leaving 24. A 20% tip or tax on 30 adds 6, for a total of 36. If 30 is a score out of a possible total, 20% of it is the share 6 represents. For percent change, reverse percentages, and "X is what percent of Y", use the full percentage calculator.