[tex]\bf \begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{18\% of 22}}{\left( \cfrac{18}{100} \right)22}\implies 3.96~\hfill \stackrel{\textit{total amount paid}}{22+3.96\implies 25.96}\\\hspace{34em}[/tex]
