$\frac{5}{16} : 1,25 * 0,36 : 1\frac{4}{5} = \frac{5}{16} : \frac{5}{4} * \frac{9}{25} : \frac{9}{5} = \frac{5}{16} * \frac{4}{5} * \frac{9}{25} * \frac{5}{9} = \frac{1}{4} * \frac{1}{1} * \frac{1}{5} * \frac{1}{1} = \frac{1}{20}$

$\frac{7}{8} : (0,75 * \frac{14}{15} : 1,2) = \frac{7}{8} : (\frac{3}{4} * \frac{14}{15} : \frac{6}{5}) = \frac{7}{8} : (\frac{1}{2} * \frac{7}{5} * \frac{5}{6}) = \frac{7}{8} : (\frac{1}{2} * \frac{7}{1} * \frac{1}{6}) = \frac{7}{8} : \frac{7}{12} = \frac{7}{8} * \frac{12}{7} = \frac{1}{2} * \frac{3}{1} = \frac{3}{2} = 1\frac{1}{2}$