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If you take 80 percent of a number and get 315, then what is that number? In other words, you know that 80 percent of a number is 315 and you want to know what that initial number is.

To solve this problem you multiply 315 by 100 and then divide the total by 80 as follows: (315 x 100) / 80

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

393.75


Therefore, the answer to "315 is 80 percent of what number?" is 393.75, and you can also derive that 80 percent of 393.75 equals 315.

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