[tex]\bf \cfrac{4}{5}\div 8\implies \cfrac{4}{5}\div \cfrac{8}{1}\implies \cfrac{\stackrel{1}{~~\begin{matrix} 4 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}}{5}\cdot \cfrac{1}{\underset{2}{~~\begin{matrix} 8 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}}\implies \cfrac{1}{10}[/tex]
