[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{6\% of 50}}{\left( \cfrac{6}{100} \right)50}\implies 3~\hfill \stackrel{\textit{total amount paid}}{50+3\implies 53}[/tex]