How to work it out
80% of 100 = 100 × 0.8 = 80
A percent means "per hundred", so 80% is 80/100, or 0.8. Multiply 100 by 0.8 to get 80. A quick mental shortcut: 10% of 100 is 10, so 80% is 10 × 8 = 80.
Related answers
- 100 plus 80% = 180 (an increase of 80)
- 100 minus 80% = 20, the price after a 80% discount
- 80 is 80% of 100, and 100 is 125% of 80
- If 100 is 80% of a number, that number is 125
Other percentages of 100
| Percent | Answer |
|---|---|
| 1% of 100 | 1 |
| 5% of 100 | 5 |
| 10% of 100 | 10 |
| 15% of 100 | 15 |
| 20% of 100 | 20 |
| 25% of 100 | 25 |
| 30% of 100 | 30 |
| 40% of 100 | 40 |
| 50% of 100 | 50 |
| 60% of 100 | 60 |
| 70% of 100 | 70 |
| 75% of 100 | 75 |
| 90% of 100 | 90 |
| 100% of 100 | 100 |
80% of other numbers
| Question | Answer |
|---|---|
| 80% of 20 | 16 |
| 80% of 50 | 40 |
| 80% of 60 | 48 |
| 80% of 80 | 64 |
| 80% of 150 | 120 |
| 80% of 200 | 160 |
| 80% of 250 | 200 |
| 80% of 500 | 400 |
| 80% of 1,000 | 800 |