How to find 4 percent of 30
"Percent" means per hundred, so 4% is the fraction 4/100, or 0.04 as a decimal. Taking 4 percent of 30 means multiplying 30 by that fraction:
4% of 30 = 30 x 4 / 100
= 120 / 100
= 1.2The same answer comes from the decimal form: 30 x 0.04 = 1.2. And because multiplication is commutative, 4% of 30 equals 30% of 4, 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 4% from those pieces: 4 x 0.3 = 1.2.
Nearby percentages of 30
| Percent | Of 30 | 30 minus it | 30 plus it |
|---|---|---|---|
| 1% | 0.3 | 29.7 | 30.3 |
| 3% | 0.9 | 29.1 | 30.9 |
| 5% | 1.5 | 28.5 | 31.5 |
| 8% | 2.4 | 27.6 | 32.4 |
| 9% | 2.7 | 27.3 | 32.7 |
| 10% | 3 | 27 | 33 |
| 15% | 4.5 | 25.5 | 34.5 |
| 20% | 6 | 24 | 36 |
| 25% | 7.5 | 22.5 | 37.5 |
| 30% | 9 | 21 | 39 |
| 50% | 15 | 15 | 45 |
| 75% | 22.5 | 7.5 | 52.5 |
4 percent of other amounts
| Amount | 4% of it |
|---|---|
| 10 | 0.4 |
| 20 | 0.8 |
| 25 | 1 |
| 40 | 1.6 |
| 50 | 2 |
| 60 | 2.4 |
| 75 | 3 |
| 80 | 3.2 |
| 100 | 4 |
| 120 | 4.8 |
Where this comes up
A 4% discount on a 30 price takes off 1.2, leaving 28.8. A 4% tip or tax on 30 adds 1.2, for a total of 31.2. If 30 is a score out of a possible total, 4% of it is the share 1.2 represents. For percent change, reverse percentages, and "X is what percent of Y", use the full percentage calculator.