a) \frac{6}{11}: (-1\frac{4}{11}) = \frac{6}{11}: (-\frac{15}{11}) = \frac{6}{11} \cdot (-\frac{11}{15}) = -\frac{6}{15} = -\frac{2}{5} = -0,4
б) -1\frac{2}{9}:3\frac{2}{3} = -\frac{11}{9}:\frac{11}{3} = -\frac{11}{9} \cdot \frac{3}{11} = -\frac{3}{9} = -\frac{1}{3}
Ответ: а) -0,4; б) -1/3