"21 is 15 percent of what number?" is a word problem where the answer is a number. Specifically, if you calculate 15 percent of number (x), you will get 21. Thus, you can illustrate the problem "21 is 15 percent of what number (x)" like this:
15% of x = 21
To calculate 15 percent of a number, we multiply the number by 15 and then divide by 100. Therefore, we can make the following function:
|
| = 21 |
To solve for x, we first multiply both sides by 100 and then divide both sides by 15 to get the x = 140. Therefore, the answer to 21 is 15 percent of what number? is:
140
If we substitue "what number" in the question "21 is 15 percent of what number?" with 140, we get this sentence: 21 is 15 percent of 140. Since this statement is true, we know that our answer is correct.
Percent Of What Number
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