Вычисли

а) \(\cfrac{1}{2}:\cfrac{3}{4}=\cfrac{1\cdot \overset{\tiny 2}{\cancel{4}}}{\underset{\tiny 1}{\cancel{2}}\cdot 3}=\) [ ] \(=\) [ ];

б) \(\cfrac{11}{12}:\cfrac{5}{9}=\cfrac{11\cdot \overset{\tiny 3}{\cancel{9}}}{\underset{\tiny 4}{\cancel{12}}\cdot 5}=\) [ ] \(=\) [ ];

в) \(\cfrac{12}{13}:\cfrac{4}{5}=\) [ ] \(=\) [ ] \(=\) [ ];

г) \(\cfrac{15}{16}:\cfrac{5}{7}=\) [ ] \(=\) [ ] \(=\) [ ];

д) \(\cfrac{1}{2}:\cfrac{7}{8}=\) [ ] \(=\) [ ] \(=\) [ ];

е) \(\cfrac{14}{11}:\cfrac{2}{3}=\) [ ] \(=\) [ ] \(=\) [ ].