What is 40 percent of 21?

Answer: 40% of 21 is 8.4.

You want to know the answer to this question: what is 40 percent of 21? Here is a very simple step-by-step guide to find out.

Step 1: A percentage is a number or ratio expressed as a fraction of 100.

\(40\%\) = \(40 \over 100 \) = \(0.4\)

Step 2: We use the following formula:

\(\text{Percentage of a value}\) = \(X \cdot P\%\)

• \(X = 21\)
• \(P\% = 40\%\) = \(40 \over 100 \) = \(0.4\)

\(Answer: 21 \cdot 40\%\) = \(21 \cdot 0.4\) = \(8.4\)

What is 40 percent of 21? 8.4

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