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If you take 4 percent of a number and get 645, then what is that number? In other words, you know that 4 percent of a number is 645 and you want to know what that initial number is.

To solve this problem you multiply 645 by 100 and then divide the total by 4 as follows: (645 x 100) / 4

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

16125


Therefore, the answer to "645 is 4 percent of what number?" is 16125, and you can also derive that 4 percent of 16125 equals 645.

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