Sumwise

What is 25 Percent of 42?

25% of 42 = 10.5

Result
10.5
Remaining
31.5
25% as decimal
0.25
42 + 25%
52.5

Sumwise · Maintained by Theo Abbott (pen name) · automated checks · Data: exact arithmetic; unit definitions from NIST SP 811 · Updated · How the checks work

How to work it out

  1. Turn the percentage into a decimal: 25 ÷ 100 = 0.25
  2. Multiply: 0.25 × 42 = 10.5
  3. Check: Work backwards: 10.5 ÷ 42 × 100 = 25%.

Another method. As a proportion of part to whole: 25/100 = part/42, so part = 25 × 42 ÷ 100 = 10.5. Both methods always give the same answer.

In a spreadsheet: =25%*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

10.5 is the 25% share of 42. The remaining 75% is 31.5, and the two parts add back up to 42.

Discounts: 25% off an item priced $42 saves $10.5, so you pay $31.5.

Adding and taking away 25%

Increasing 42 by 25% gives 52.5 and decreasing it by 25% gives 31.5. These do not cancel out: raising 42 by 25% and then lowering the result by 25% ends at 39.375, because the second 25% is taken of a bigger number.

Related results

Results for nearby numbers
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

50% of 42

50% of 42 = 21

75% of 42

75% of 42 = 31.5

The other way round: 42% of 25. 25% of 42 and 42% of 25 are always equal (both are 25 × 42 ÷ 100 = 10.5), so you can swap the numbers when one order is easier to work out in your head.

Practice

5% of 86
Show answer

5% of 86 = 4.3

73% of 71
Show answer

73% of 71 = 51.83

58% of 65
Show answer

58% of 65 = 37.7

35% of 2
Show answer

35% of 2 = 0.7

5% of 39
Show answer

5% of 39 = 1.95

66% of 94
Show answer

66% of 94 = 62.04

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 25 Percent of 42?

25% of 42 is 10.5. Formula, steps and practice examples.

What is 25% off 42?

31.5. Taking 25% off leaves 75% of 42.

What is 42 plus 25%?

52.5. Adding 25% is the same as multiplying by 1.25.