\[- 0,4 - 1\frac{11}{18} = - \frac{2^{\backslash 18}}{5} - 1\frac{11^{\backslash 5}}{18} =\]
\[= - \frac{36}{80} - 1\frac{55}{80} = - 1\frac{91}{80} = - 2\frac{11}{80}.\]