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If you take 15 percent of a number and get 639, then what is that number? In other words, you know that 15 percent of a number is 639 and you want to know what that initial number is.

To solve this problem you multiply 639 by 100 and then divide the total by 15 as follows: (639 x 100) / 15

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

4260


Therefore, the answer to "639 is 15 percent of what number?" is 4260, and you can also derive that 15 percent of 4260 equals 639.

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