Question

18% of what number is 63?

Answer 1

Let us assume the unknown number = x
Then we can write the equation for finding the unknown number as
18x/100 = 63
18x = 63 * 100
18x = 6300
x = 6300/18
  = 350
So the unknown number is 350. I hope this is the answer you were looking for. The process used here is one of the simplest processes. Hopefully you can solve such problems very easily in the future without requiring any help from other people.

Answer 2

$\displaystyle \frac{18}{100} \cdot x=63 \\ \\ \frac{18x}{100} =63 \\ \\ 18x=63 \cdot 100 \\ 18x=6300 \\ x= \frac{6300}{18} \\ \\ \boxed{x=350 }$