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If you take 5 percent of a number and get 639, then what is that number? In other words, you know that 5 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 5 as follows: (639 x 100) / 5

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

12780


Therefore, the answer to "639 is 5 percent of what number?" is 12780, and you can also derive that 5 percent of 12780 equals 639.

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