Question

90% of the tickets sold at an amusement park were discount tickets. If the park sold 30 tickets in all, how many discount tickets did it sell?

Answer 1

27 first divide 30 by ten then multiply that by 9

Answer 2

well, what's 90% of 30?

`\begin{array}c \cline{1-1} \textit{\textit{\LARGE a}\% of \textit{\LARGE b}}\\ \cline{1-1} \\ \left( \cfrac{\textit{\LARGE a}}{100} \right)\cdot \textit{\LARGE b} \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{90\% of 30}}{\left( \cfrac{90}{100} \right)30}\implies 27`