What is 40 Percent of 42?
40% of 42 = 16.8
- Result
- 16.8
- Remaining
- 25.2
- 40% as decimal
- 0.4
- 42 + 40%
- 58.8
Sumwise · 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: 40 ÷ 100 = 0.4
- Multiply: 0.4 × 42 = 16.8
- Check: Work backwards: 16.8 ÷ 42 × 100 = 40%.
Another method. As a proportion of part to whole: 40/100 = part/42, so part = 40 × 42 ÷ 100 = 16.8. Both methods always give the same answer.
In a spreadsheet: =40%*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
16.8 is the 40% share of 42. The remaining 60% is 25.2, and the two parts add back up to 42.
Discounts: 40% off an item priced $42 saves $16.8, so you pay $25.2.
Adding and taking away 40%
Increasing 42 by 40% gives 58.8 and decreasing it by 40% gives 25.2. These do not cancel out: raising 42 by 40% and then lowering the result by 40% ends at 35.28, because the second 40% 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 40
Practice
| 8% of 14 | Show answer8% of 14 = 1.12 |
| 67% of 88 | Show answer67% of 88 = 58.96 |
| 18% of 60 | Show answer18% of 60 = 10.8 |
| 33% of 4 | Show answer33% of 4 = 1.32 |
| 5% of 39 | Show answer5% of 39 = 1.95 |
| 85% of 29 | Show answer85% of 29 = 24.65 |
How answers are calculated and checked: methodology.
Questions
What is 40 Percent of 42?
40% of 42 is 16.8. Formula, steps and practice examples.
What is 40% off 42?
25.2. Taking 40% off leaves 60% of 42.
What is 42 plus 40%?
58.8. Adding 40% is the same as multiplying by 1.4.