90 is what percent of 409? (What percent of 409 is 90?)

90 is what percent of 409?

The question here is "90 is what percent of 409?" which is the same as "What percent of 409 is 90?" This math word problem is asking "what percent" so we know that the answer should be a percent. Specifically, what percent (x) of 409 equals 90.

The problem is therefore x% of 409 = 90 which can be written as a function:

		x ∗ 409
		100

= 90

And when we solve the function above for x, we get 22.005. The answer to "90 is what percent of 409?" is therefore:

22.005%

How can we know the answer is correct? We know the answer is correct because 22.005 percent of 409 is 90.

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