[tex] \frac{ \frac{14}{15} }{ \frac{7}{12} } = \frac{14}{15} * \frac{12}{7} = \frac{2*4}{5} = \frac{8}{5} [/tex]
[tex] \frac{ \frac{-1}{2}- \frac{3}{3} }{ \frac{3}{2} - \frac{2}{3} } = \frac{ \frac{-3-6}{6} }{ \frac{9-4}{6} } = \frac{ \frac{-9}{6} }{ \frac{5}{6} } = \frac{-9}{6} * \frac{6}{5} = \frac{-9}{5} [/tex]
