How to find 5 percent of 40
"Percent" means per hundred, so 5% is the fraction 5/100, or 0.05 as a decimal. Taking 5 percent of 40 means multiplying 40 by that fraction:
5% of 40 = 40 x 5 / 100
= 200 / 100
= 2The same answer comes from the decimal form: 40 x 0.05 = 2. And because multiplication is commutative, 5% of 40 equals 40% of 5, which is sometimes the easier way to see it in your head.
Mental math shortcut
10% of 40 is 4 (move the decimal one place left), and 1% is 0.4. Build 5% from those pieces: 5 x 0.4 = 2.
Nearby percentages of 40
| Percent | Of 40 | 40 minus it | 40 plus it |
|---|---|---|---|
| 1% | 0.4 | 39.6 | 40.4 |
| 4% | 1.6 | 38.4 | 41.6 |
| 6% | 2.4 | 37.6 | 42.4 |
| 10% | 4 | 36 | 44 |
| 15% | 6 | 34 | 46 |
| 20% | 8 | 32 | 48 |
| 25% | 10 | 30 | 50 |
| 30% | 12 | 28 | 52 |
| 50% | 20 | 20 | 60 |
| 75% | 30 | 10 | 70 |
5 percent of other amounts
| Amount | 5% of it |
|---|---|
| 10 | 0.5 |
| 20 | 1 |
| 25 | 1.25 |
| 30 | 1.5 |
| 50 | 2.5 |
| 60 | 3 |
| 75 | 3.75 |
| 80 | 4 |
| 100 | 5 |
| 120 | 6 |
Where this comes up
A 5% discount on a 40 price takes off 2, leaving 38. A 5% tip or tax on 40 adds 2, for a total of 42. If 40 is a score out of a possible total, 5% of it is the share 2 represents. For percent change, reverse percentages, and "X is what percent of Y", use the full percentage calculator.