Hello,

I am trying to come up with a formula (or use an existing one) to calculate a certain percentage (known) of an unknown number to give a known result.

For example, a problem might come in this form: 2.9% of this number is equal to 675. What is the number?

Any ideas?

Edit: Sorry, I just noticed I posted this in the wrong forum. (I misread Calculator for Calculation). Please delete!