Question

54 is 90% of what number

Answer 1

$\begin{array}{ccc}90\%&-&54\\\\100\%&-&x\end{array}\ \ \ |cross\ multiply\\\\\\90x=54\cdot100\ \ \ \ |divide\ both\ sides\ by\ 90\\\\x=\frac{54\cdot100}{90}\\\\x=\frac{54\cdot10}{9}\\\\x=\frac{6\cdot10}{1}\\\\\boxed{x=60}\leftarrow answer$

Answer 2

54 is n of 90

54= nx90

n=54/90= .6 is 60%