How do you find the percentage of something?

This question is similar to the above, but most of the people who ask this specific question are actually referring to the question: Number A is C% of any number. Let's call B for this number to solve this. The first percentage C is expressed as a decimal number divided by 100 and divided by A. B = A / (C / 100). The following example illustrates this more clearly:

Example: 5 is 20% of which number? This number is calculated as 5 / (20/100) = 5 / 0.2 = 25.