(1,2:36+1,2:0,25-1 5/6):169/24

$(1.2:36+1.2:0.25-1 \frac{5}{6} ): \frac{169}{24} = \frac{72}{169} \\ \\ 1)1.2:36=1 \frac{2}{10} :36=1 \frac{1}{5} :36= \frac{6}{5} :36= \frac{6}{5*36} = \frac{1}{5*6} = \frac{1}{30} \\ 2)1.2:0.25=1 \frac{2}{10} : \frac{25}{100} =1 \frac{1}{5} : \frac{1}{4} = \frac{6}{5} : \frac{1}{4} = \frac{6*4}{5} = \frac{24}{5} =4 \frac{4}{5} \\ 3) \frac{1}{30} +4 \frac{4}{5} = \frac{1}{30} +4 \frac{24}{30} =4 \frac{25}{30} =4 \frac{5}{6} \\ 4)4 \frac{5}{6} -1 \frac{5}{6} =3 \\$

$5)3: \frac{169}{24} = \frac{3*24}{169} = \frac{72}{169}$