\[\left( 1\frac{1}{5} + 2\frac{3}{10} \right)\ :1\frac{1}{2} =\]
\[= \left( \frac{6^{\backslash 2}}{5} + \frac{23}{10} \right)\ :\frac{3}{2} = \frac{12 + 23}{10} \cdot \frac{2}{3} =\]
\[= \frac{35}{15} = \frac{7}{3} = 2\frac{1}{3}.\]