15 is what percent of 87? (What percent of 87 is 15?)

15 is what percent of 87?

The question here is "15 is what percent of 87?" which is the same as "What percent of 87 is 15?" This math word problem is asking "what percent" so we know that the answer should be a percent. Specifically, what percent (x) of 87 equals 15.

The problem is therefore x% of 87 = 15 which can be written as a function:

		x ∗ 87
		100

= 15

And when we solve the function above for x, we get 17.241. The answer to "15 is what percent of 87?" is therefore:

17.241%

How can we know the answer is correct? We know the answer is correct because 17.241 percent of 87 is 15.

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