a) \(\frac{9}{16} : 6 = \frac{9}{16} \cdot \frac{1}{6}\)
\(12 : \frac{5}{8} = 12 \cdot \frac{8}{5}\)
б) \(\frac{3}{10} : \frac{8}{11} = \frac{3}{10} \cdot \frac{11}{8}\)
\(\frac{7}{12} : 3\frac{1}{16} = \frac{7}{12} : \frac{49}{16} = \frac{7}{12} \cdot \frac{16}{49}\)