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If you take 90 percent of a number and get 621, then what is that number? In other words, you know that 90 percent of a number is 621 and you want to know what that initial number is.

To solve this problem you multiply 621 by 100 and then divide the total by 90 as follows: (621 x 100) / 90

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

690


Therefore, the answer to "621 is 90 percent of what number?" is 690, and you can also derive that 90 percent of 690 equals 621.

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