\[\left( 10\frac{2}{3} - 5\frac{1}{3} \right)\ :3\frac{1}{3} =\]
\[= \left( \frac{32}{3} - \frac{16}{3} \right)\ :\frac{10}{3} = \frac{16 \cdot 3}{3 \cdot 10} =\]
\[= \frac{16}{10} = 1,6\]