How to work it out
40% of 100 = 100 × 0.4 = 40
A percent means "per hundred", so 40% is 40/100, or 0.4. Multiply 100 by 0.4 to get 40. A quick mental shortcut: 10% of 100 is 10, so 40% is 10 × 4 = 40.
Related answers
- 100 plus 40% = 140 (an increase of 40)
- 100 minus 40% = 60, the price after a 40% discount
- 40 is 40% of 100, and 100 is 250% of 40
- If 100 is 40% of a number, that number is 250
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 |
| 50% of 100 | 50 |
| 60% of 100 | 60 |
| 70% of 100 | 70 |
| 75% of 100 | 75 |
| 80% of 100 | 80 |
| 90% of 100 | 90 |
| 100% of 100 | 100 |
40% of other numbers
| Question | Answer |
|---|---|
| 40% of 20 | 8 |
| 40% of 50 | 20 |
| 40% of 60 | 24 |
| 40% of 80 | 32 |
| 40% of 150 | 60 |
| 40% of 200 | 80 |
| 40% of 250 | 100 |
| 40% of 500 | 200 |
| 40% of 1,000 | 400 |