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| Math Central | Quandaries & Queries |
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Question from Renay, a student: What is the correct way to figure a percentage like 23 correct out of 28? |
Hi Renay,
23 out of 28 is pretty good. To express it as a percentage you want an equivalent fraction to 23/28, but with a denominator of 100. (Per cent means per one hundred.) Thus you want x when
23/28 = x/100.
Hence
x = 100 × 23/28 = 82.1.
Thus your grade can be expressed as 82.1%.
Penny
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