[tex]a) \ -1\dfrac{5}{9}:1,4= -\dfrac{14}{9}:\dfrac{14}{10} = -\dfrac{\not\!\!14}{9}\cdot\dfrac{10}{\not\!\!14} =-\dfrac{10}{9}=\boxed{-1\dfrac{1}{9} }[/tex]
[tex]b) \ 1\dfrac{1}{8} :(-0,3)=\dfrac{9}{8} :(-\dfrac{3}{10})= \dfrac{\not\!9 \ ^{3}}{\not\!8\ _4} \cdot(-\dfrac{\not\!\!10\ ^{5}}{\not\!3})= -\dfrac{15}{4} =\boxed{-3\dfrac{3}{4} }[/tex]
