Question

Simplify 9 is 15% of what

Answer 1

$Method\ 1:\\\\\begin{matrix}9&-&15\%&\text{divide both sides by 3}\\3&-&5\%&\text{multiply both sides by 20}\\60&-&100\%\end{matrix}\\\\Answer:\ \boxed{9\ is\ 15\%\ of\ 60}$

$Method\ 2:\\\\Proportion\\\\\begin{array}{ccc}9&-&15\%\\x&-&100\%\end{array}\qquad\text{cross multiply}\\\\15x=(9)(100)\\15x=900\qquad\text{divide both sides by 15}\\\boxed{x=60}$