Answer
$0.8\overline{3}$
Work Step by Step
The denominator can be not expanded to 10,100,1000...
because it has factors other than 2 and 5.
Long division:
$\begin{array}{lllllll}
& 0. & 8 & 3 & 3... & & \\
& -- & -- & -- & -- & -- & \\
6 & ) & 5. & 0 & 0 & 0 & \\
& & 4 & 8 & & & \\
& & -- & -- & & & \\
& & & 2 & 0 & & \\
& & & 1 & 8 & & \\
& & & -- & -- & & \\
& & & & 2 & 0 & repeats\\
& & & & & &
\end{array}$
$-\displaystyle \frac{5}{6}=-5\div 6=0.83333...=0.8\overline{3}$
