Respuesta :
[tex]\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{8\% of 40}}{\left( \cfrac{8}{100} \right)40}\implies 3.2~\hfill \underset{total~price}{\stackrel{40~~ + ~~3.2}{43.2}}[/tex]
