как решить примеры 27/52 :81/65 9 5/7: 1 23/28 42 :6/7

 frac{27}{52} : frac{81}{65}  = frac{27}{52} * frac{65}{81} = frac{1}{52} * frac{65}{3} = frac{65}{156}
\ frac{95}{7} : frac{123}{28} = frac{95}{7} * frac{28}{123} =95* frac{4}{129} = frac{380}{129} \ 42: frac{6}{7}=42* frac{7}{6} =7*7=49