Question

9 is 12% of which number

Answer 1

say number "x"
that means that 9 is 12% of x... so "x" is really the 100%
so one could say that \(\large {
\begin{array}{ccllll}
amount&\%
\\\hline\\
9&12\\
x&100
\end{array}\implies \cfrac{9}{x}=\cfrac{12}{100}
}\)

solve for "x"