Вычислите номер 1517

1) Числитель
$(4 \frac{5}{12} -3 \frac{7}{18}):9,25+ \frac{5}{6} =\frac{(4*12+5)*3-(3*18+7)*2}{36}: \frac{37}{4} + \frac{5}{6} =$
$=\frac{53*3-61*2}{36}* \frac{4}{37} + \frac{5}{6} =\frac{37}{9}* \frac{1}{37} + \frac{5}{6} = \frac{1}{9}+ \frac{5}{6} = \frac{2}{18}+ \frac{15}{18} = \frac{17}{18}$
Знаменатель
$(0,4+ \frac{1}{8} +0,75)* \frac{2}{3} =( \frac{2}{5} + \frac{1}{8} + \frac{3}{4} )* \frac{2}{3} = \frac{16+5+30}{40}* \frac{2}{3}= \frac{51}{20*3} = \frac{17}{20}$
Делим
$\frac{17}{18}: \frac{17}{20} = \frac{17}{18}* \frac{20}{17} = \frac{20}{18} = \frac{10}{9}$

2) Числитель
$3 \frac{7}{15} *0,25+ \frac{5}{6} -1 \frac{2}{5} = \frac{52}{15}* \frac{1}{4}+ \frac{5}{6} - \frac{7}{5} = \frac{26}{30} + \frac{25}{30} - \frac{42}{30} = \frac{9}{30}= \frac{3}{10}$
Знаменатель
$5,4:( \frac{3}{20} +0,75)= \frac{54}{10}:( \frac{3}{20} + \frac{3}{4})= \frac{54}{10}: \frac{3+15}{20}=\frac{54}{10}* \frac{20}{18}= \frac{54}{18}* \frac{20}{10}=6$
Делим
$\frac{3}{10}:6= \frac{3}{10}* \frac{1}{6} = \frac{1}{20} = \frac{5}{100} =0,05$