[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{2\% of 19.99}}{\left( \cfrac{2}{100} \right)19.99}\implies 0.3998~\hfill \underset{total~price}{\stackrel{19.99+.03998}{\approx 20.39}}[/tex]
