What is 42 Percent of 50?
42% of 50 = 21
- Result
- 21
- Remaining
- 29
- 42% as decimal
- 0.42
- 50 + 42%
- 71
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 × 50 = 21
- Check: Work backwards: 21 ÷ 50 × 100 = 42%.
Another method. As a proportion of part to whole: 42/100 = part/50, so part = 42 × 50 ÷ 100 = 21. Both methods always give the same answer.
In a spreadsheet: =42%*50. 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
21 is the 42% share of 50. The remaining 58% is 29, and the two parts add back up to 50.
Discounts: 42% off an item priced $50 saves $21, so you pay $29.
Adding and taking away 42%
Increasing 50 by 42% gives 71 and decreasing it by 42% gives 29. These do not cancel out: raising 50 by 42% and then lowering the result by 42% ends at 41.18, because the second 42% is taken of a bigger number.
Related results
| 5% of 50 | 5% of 50 = 2.5 |
| 10% of 50 | 10% of 50 = 5 |
| 15% of 50 | 15% of 50 = 7.5 |
| 20% of 50 | 20% of 50 = 10 |
| 25% of 50 | 25% of 50 = 12.5 |
| 50% of 50 | 50% of 50 = 25 |
| 75% of 50 | 75% of 50 = 37.5 |
The other way round: 50% of 42
Practice
| 9% of 5 | Show answer9% of 5 = 0.45 |
| 10% of 21 | Show answer10% of 21 = 2.1 |
| 43% of 51 | Show answer43% of 51 = 21.93 |
| 79% of 45 | Show answer79% of 45 = 35.55 |
| 6% of 43 | Show answer6% of 43 = 2.58 |
| 44% of 20 | Show answer44% of 20 = 8.8 |
How answers are calculated and checked: methodology.
Questions
What is 42 Percent of 50?
42% of 50 is 21. Formula, steps and practice examples.
What is 42% off 50?
29. Taking 42% off leaves 58% of 50.
What is 50 plus 42%?
71. Adding 42% is the same as multiplying by 1.42.