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Last updated on March 28th, 2025
Percentages are a way to express numbers as parts of a whole. A percentage is a fraction of 100, and it's represented using the percent sign (%). Calculating percentages is a fundamental mathematical skill. For example, to find out what percentage 21 is out of 40, we will learn how to convert a fraction to a percentage.
The percentage for 21 out of 40 is 52.5%.
Converting a fraction to a percentage is a common task that can be done with ease. Follow the steps below to find the answer.
Step 1: Start with the fraction 21/40. This represents 21 out of 40 parts.
Step 2: To convert a fraction to a percentage, you multiply it by 100. 21/40 × 100 = 52.5
Step 3: The result is 52.5, which means 21 out of 40 is 52.5%.
Thus, 21 out of 40 can be expressed as 52.5%.