1(7/10) divided by 8(1/2)
\(1\dfrac {7}{10} = \dfrac {17}{10}\\ 8\dfrac {1}{2} = \dfrac {17}{2}\)
\(\dfrac {\dfrac {17}{10}}{\dfrac {17}{2} } = \dfrac {17}{10}\times \dfrac {2}{17}=\dfrac{2}{10}=\dfrac 1 5\)