What is 18 out of 21 as a percentage?

When you ask "What is 18 out of 21?" you want to know what percent 18 is out of 21.

Here are step-by-step instructions showing you how we calculated 18 out of 21 as a percentage:

The first step is to divide 18 by 21 to get the answer in decimal form:

18 ÷ 21 ≈ 0.8571

Then, we multiplied the answer from the first step by one hundred to get the answer as a percentage:

0.8571 × 100 = 85.71%

We can prove that the answer is correct by taking 85.71 percent of 21 to get 18:

(21 × 85.71) ÷ 100 ≈ 18

Note that our calculator rounds the answers up to two decimals if necessary. Once again, the answer is as follows:

≈ 85.71%

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