How to find 5 percent of 100
"Percent" means per hundred, so 5% is the fraction 5/100, or 0.05 as a decimal. Taking 5 percent of 100 means multiplying 100 by that fraction:
5% of 100 = 100 x 5 / 100
= 500 / 100
= 5The same answer comes from the decimal form: 100 x 0.05 = 5. And because multiplication is commutative, 5% of 100 equals 100% of 5, which is sometimes the easier way to see it in your head.
Mental math shortcut
10% of 100 is 10 (move the decimal one place left), and 1% is 1. Build 5% from those pieces: 5 x 1 = 5.
Nearby percentages of 100
| Percent | Of 100 | 100 minus it | 100 plus it |
|---|---|---|---|
| 1% | 1 | 99 | 101 |
| 4% | 4 | 96 | 104 |
| 6% | 6 | 94 | 106 |
| 10% | 10 | 90 | 110 |
| 15% | 15 | 85 | 115 |
| 20% | 20 | 80 | 120 |
| 25% | 25 | 75 | 125 |
| 30% | 30 | 70 | 130 |
| 50% | 50 | 50 | 150 |
| 75% | 75 | 25 | 175 |
5 percent of other amounts
| Amount | 5% of it |
|---|---|
| 20 | 1 |
| 25 | 1.25 |
| 30 | 1.5 |
| 40 | 2 |
| 50 | 2.5 |
| 60 | 3 |
| 75 | 3.75 |
| 80 | 4 |
| 120 | 6 |
| 150 | 7.5 |
Where this comes up
A 5% discount on a 100 price takes off 5, leaving 95. A 5% tip or tax on 100 adds 5, for a total of 105. If 100 is a score out of a possible total, 5% of it is the share 5 represents. For percent change, reverse percentages, and "X is what percent of Y", use the full percentage calculator.