\begin{array}{l}
 \frac{5}{6} + \frac{3}{4} + 2 = \frac{{43}}{{12}} \\ 
  \\ 
 86:\frac{{43}}{{12}} = 86 \cdot \frac{{12}}{{43}} = 24 \\ 
  \\ 
 \frac{5}{6}:\frac{3}{4}:2 = (\frac{5}{6} \cdot 24):(\frac{3}{4} \cdot 24):(2 \cdot 24) = 20:18:48 \\ 
 \end{array}