"15 is 21 percent of what number?" is a word problem where the answer is a number. Specifically, if you calculate 21 percent of number (x), you will get 15. Thus, you can illustrate the problem "15 is 21 percent of what number (x)" like this:
21% of x = 15
To calculate 21 percent of a number, we multiply the number by 21 and then divide by 100. Therefore, we can make the following function:
|
| = 15 |
To solve for x, we first multiply both sides by 100 and then divide both sides by 21 to get the x = 71.43. Therefore, the answer to 15 is 21 percent of what number? is:
71.43
If we substitue "what number" in the question "15 is 21 percent of what number?" with 71.43, we get this sentence: 15 is 21 percent of 71.43. Since this statement is true, we know that our answer is correct.
Percent Of What Number
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