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If you take 80 percent of a number and get 400, then what is that number? In other words, you know that 80 percent of a number is 400 and you want to know what that initial number is.

To solve this problem you multiply 400 by 100 and then divide the total by 80 as follows: (400 x 100) / 80

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

500


Therefore, the answer to "400 is 80 percent of what number?" is 500, and you can also derive that 80 percent of 500 equals 400.

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