What is 42 Percent of 20?
42% of 20 = 8.4
- Result
- 8.4
- Remaining
- 11.6
- 42% as decimal
- 0.42
- 20 + 42%
- 28.4
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: 42 ÷ 100 = 0.42
- Multiply: 0.42 × 20 = 8.4
- Check: Work backwards: 8.4 ÷ 20 × 100 = 42%.
Another method. As a proportion of part to whole: 42/100 = part/20, so part = 42 × 20 ÷ 100 = 8.4. Both methods always give the same answer.
In a spreadsheet: =42%*20. 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
8.4 is the 42% share of 20. The remaining 58% is 11.6, and the two parts add back up to 20.
Discounts: 42% off an item priced $20 saves $8.4, so you pay $11.6.
Adding and taking away 42%
Increasing 20 by 42% gives 28.4 and decreasing it by 42% gives 11.6. These do not cancel out: raising 20 by 42% and then lowering the result by 42% ends at 16.472, because the second 42% is taken of a bigger number.
Related results
| 5% of 20 | 5% of 20 = 1 |
| 10% of 20 | 10% of 20 = 2 |
| 15% of 20 | 15% of 20 = 3 |
| 20% of 20 | 20% of 20 = 4 |
| 25% of 20 | 25% of 20 = 5 |
| 50% of 20 | 50% of 20 = 10 |
| 75% of 20 | 75% of 20 = 15 |
The other way round: 20% of 42
Practice
| 8% of 51 | Show answer8% of 51 = 4.08 |
| 60% of 35 | Show answer60% of 35 = 21 |
| 18% of 94 | Show answer18% of 94 = 16.92 |
| 38% of 77 | Show answer38% of 77 = 29.26 |
| 98% of 6 | Show answer98% of 6 = 5.88 |
| 13% of 45 | Show answer13% of 45 = 5.85 |
How answers are calculated and checked: methodology.
Questions
What is 42 Percent of 20?
42% of 20 is 8.4. Formula, steps and practice examples.
What is 42% off 20?
11.6. Taking 42% off leaves 58% of 20.
What is 20 plus 42%?
28.4. Adding 42% is the same as multiplying by 1.42.