What is 9 Percent of 42?
9% of 42 = 3.78
- Result
- 3.78
- Remaining
- 38.22
- 9% as decimal
- 0.09
- 42 + 9%
- 45.78
Sumwise · Checked by Theo Abbott · Data: exact arithmetic; unit definitions from NIST SP 811 · Updated · How we check it
How to work it out
- Turn the percentage into a decimal: 9 ÷ 100 = 0.09
- Multiply: 0.09 × 42 = 3.78
- Check: Work backwards: 3.78 ÷ 42 × 100 = 9%.
Another method. As a proportion of part to whole: 9/100 = part/42, so part = 9 × 42 ÷ 100 = 3.78. Both methods always give the same answer.
In a spreadsheet: =9%*42. Forgetting to divide the percentage by 100 makes the answer 100 times too big. Note that x% of y always equals y% of x.
What the result means
3.78 is the 9% share of 42. The remaining 91% is 38.22, and the two parts add back up to 42.
Discounts: 9% off an item priced $42 saves $3.78, so you pay $38.22.
Adding and taking away 9%
Increasing 42 by 9% gives 45.78 and decreasing it by 9% gives 38.22. These do not cancel out: raising 42 by 9% and then lowering the result by 9% ends at 41.6598, because the second 9% is taken of a bigger number.
Related results
| 5% of 42 | 5% of 42 = 2.1 |
| 10% of 42 | 10% of 42 = 4.2 |
| 15% of 42 | 15% of 42 = 6.3 |
| 20% of 42 | 20% of 42 = 8.4 |
| 25% of 42 | 25% of 42 = 10.5 |
| 50% of 42 | 50% of 42 = 21 |
| 75% of 42 | 75% of 42 = 31.5 |
The other way round: 42% of 9
Practice
| 3% of 7 | Show answer3% of 7 = 0.21 |
| 49% of 38 | Show answer49% of 38 = 18.62 |
| 53% of 74 | Show answer53% of 74 = 39.22 |
| 98% of 66 | Show answer98% of 66 = 64.68 |
| 89% of 19 | Show answer89% of 19 = 16.91 |
| 33% of 5 | Show answer33% of 5 = 1.65 |
How answers are calculated and checked: methodology.
Questions
What is 9 Percent of 42?
9% of 42 is 3.78. Formula, steps and practice examples.
What is 9% off 42?
38.22. Taking 9% off leaves 91% of 42.
What is 42 plus 9%?
45.78. Adding 9% is the same as multiplying by 1.09.