Sumwise

42 is What Percent of 80?

42 is 52.5% of 80

Percentage
52.5%
Decimal
0.525
Fraction
42/80
Ratio
42:80

Sumwise · Checked by Theo Abbott · Data: exact arithmetic; unit definitions from NIST SP 811 · Updated · How we check it

How to work it out

  1. Divide the part by the whole: 42 ÷ 80 = 0.525
  2. Multiply by 100: 0.525 × 100 = 52.5%
  3. Check: Work backwards: 52.5% of 80 is 0.525 × 80 = 42.

Another method. As a proportion of part to whole: 42/80 = p/100, so p = 42 × 100 ÷ 80 = 52.5%. Both methods always give the same answer.

In a spreadsheet: =42/80*100. Dividing the wrong way round (whole ÷ part) gives a different answer. The number after “of” is always the whole, so it goes on the bottom.

What the result means

42 is more than half but less than three quarters of 80. The part that is left, 38, is the other 47.5%.

Test scores: 42 correct answers out of 80 is a score of 52.5%, which on a common US grading scale is an F.

Turning it around

If you know that 42 is 52.5% of a number, you can get that number back: 42 ÷ 0.525 = 80. And 80 as a percentage of 42 is 190.4762%, a different answer, because the whole has changed.

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The other way round: 80 is what percent of 42?

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Calculate another

How answers are calculated and checked: methodology.

Questions

42 is What Percent of 80?

42 is 52.5% of 80. See the formula, the steps and practice examples.

What is 42 out of 80 as a fraction?

42/80, which simplifies to 21/40. As a decimal it is 0.525.

Is 42 more than half of 80?

Yes. Half of 80 is 40, and 42 is more than that.