40 is what percent of 878? (What percent of 878 is 40?)

40 is what percent of 878?

The question here is "40 is what percent of 878?" which is the same as "What percent of 878 is 40?" This math word problem is asking "what percent" so we know that the answer should be a percent. Specifically, what percent (x) of 878 equals 40.

The problem is therefore x% of 878 = 40 which can be written as a function:

		x ∗ 878
		100

= 40

And when we solve the function above for x, we get 4.556. The answer to "40 is what percent of 878?" is therefore:

4.556%

How can we know the answer is correct? We know the answer is correct because 4.556 percent of 878 is 40.

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