12 is 40% of 30. Divide 12 by 30 and multiply by 100: 12 ÷ 30 = 0.4, and 0.4 × 100 = 40%.
How to work out what percent 12 is of 30
Percent = (X ÷ Y) × 100
- Write it as a fraction: 12/30 (simplifies to 2/5).
- Divide: 12 ÷ 30 = 0.4.
- Multiply by 100: 0.4 × 100 = 40%.
Check: 40% of 30 = 40 × 30 ÷ 100 = 12.
Nearby values
| 7 is what % of 30 | 23.33% |
| 8 is what % of 30 | 26.67% |
| 9 is what % of 30 | 30% |
| 10 is what % of 30 | 33.33% |
| 11 is what % of 30 | 36.67% |
| 12 is what % of 30 | 40% |
| 13 is what % of 30 | 43.33% |
| 14 is what % of 30 | 46.67% |
| 15 is what % of 30 | 50% |
| 16 is what % of 30 | 53.33% |
| 17 is what % of 30 | 56.67% |
| 10% of 30 | 3 |
| 20% of 30 | 6 |
| 25% of 30 | 7.5 |
| 50% of 30 | 15 |
| 75% of 30 | 22.5 |
Practising percentages? Free printable percentage worksheets with answer keys.