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If you take 18 percent of a number and get 90, then what is that number? In other words, you know that 18 percent of a number is 90 and you want to know what that initial number is.

To solve this problem you multiply 90 by 100 and then divide the total by 18 as follows: (90 x 100) / 18

When we put that into our calculator, we get the following answer:

500


Therefore, the answer to "90 is 18 percent of what number?" is 500, and you can also derive that 18 percent of 500 equals 90.

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