How to find 80 percent of 50
"Percent" means per hundred, so 80% is the fraction 80/100, or 0.8 as a decimal. Taking 80 percent of 50 means multiplying 50 by that fraction:
80% of 50 = 50 x 80 / 100
= 4,000 / 100
= 40The same answer comes from the decimal form: 50 x 0.8 = 40. And because multiplication is commutative, 80% of 50 equals 50% of 80, which is sometimes the easier way to see it in your head.
Mental math shortcut
10% of 50 is 5 (move the decimal one place left), and 1% is 0.5. Build 80% from those pieces: 8 x 5 = 40.
Nearby percentages of 50
| Percent | Of 50 | 50 minus it | 50 plus it |
|---|---|---|---|
| 1% | 0.5 | 49.5 | 50.5 |
| 5% | 2.5 | 47.5 | 52.5 |
| 10% | 5 | 45 | 55 |
| 15% | 7.5 | 42.5 | 57.5 |
| 20% | 10 | 40 | 60 |
| 25% | 12.5 | 37.5 | 62.5 |
| 30% | 15 | 35 | 65 |
| 50% | 25 | 25 | 75 |
| 75% | 37.5 | 12.5 | 87.5 |
| 79% | 39.5 | 10.5 | 89.5 |
| 81% | 40.5 | 9.5 | 90.5 |
| 85% | 42.5 | 7.5 | 92.5 |
80 percent of other amounts
| Amount | 80% of it |
|---|---|
| 10 | 8 |
| 20 | 16 |
| 25 | 20 |
| 30 | 24 |
| 40 | 32 |
| 60 | 48 |
| 75 | 60 |
| 80 | 64 |
| 100 | 80 |
| 120 | 96 |
Where this comes up
A 80% discount on a 50 price takes off 40, leaving 10. A 80% tip or tax on 50 adds 40, for a total of 90. If 50 is a score out of a possible total, 80% of it is the share 40 represents. For percent change, reverse percentages, and "X is what percent of Y", use the full percentage calculator.