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If you take 9 percent of a number and get 509, then what is that number? In other words, you know that 9 percent of a number is 509 and you want to know what that initial number is.

To solve this problem you multiply 509 by 100 and then divide the total by 9 as follows: (509 x 100) / 9

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

5655.56


Therefore, the answer to "509 is 9 percent of what number?" is 5655.56, and you can also derive that 9 percent of 5655.56 equals 509.

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