[tex]( \frac{ - 7}{- 3} ) \div (\frac{ - 5}{6} )[/tex]
[tex] \frac{ - 7}{ - 3} \div \frac{ - 5}{6} [/tex]
[tex] - \frac{7}{3} \times \frac{6}{5} [/tex]
[tex] - 7 \times \frac{2}{5} [/tex]
[tex] rta = - \frac{14}{5} [/tex]
[tex]( \frac{64}{ - 27} ) \div ( \frac{ - 12}{7} ) \\ \\ \frac{64}{ - 27} \div \frac{ - 12}{7} \\ \\ \frac{64}{27} \times \frac{7}{12} \\ \\ \frac{16}{27} \times \frac{7}{3} \\ rta = \frac{112}{81} [/tex]