ПОМОГИТЕ,Найдите значения выражения: а)0,4/0,5; б)0,25/1,5; в)1,7/0,3 г)12,6/1,2 д)3,8/20...

Решите задачу:

$1) \frac{0.4}{0.5} = \frac{4}{10} : \frac{5}{10} = \frac{4*10}{10*5} = \frac{4}{5} = \frac{8}{10} =0.8 \\ \\ 2) \frac{0.25}{1.5} = \frac{25}{100} : \frac{15}{10}= \frac{25*10}{100*15} = \frac{25}{15} = \frac{5}{3} =1 \frac{2}{3} \\ \\ 3) \frac{1.7}{0.3} = \frac{17}{10} : \frac{3}{10} = \frac{17*10}{3*10} = \frac{17}{3} =5 \frac{2}{3} \\ \\ 4) \frac{12.6}{1.2} = \frac{126}{10} * \frac{10}{12} =10.5 \\$

$5) \frac{3.8}{20} = \frac{38}{10} * \frac{1}{20} = \frac{38}{10*20} = \frac{19}{10*10} = \frac{19}{100} =0.19 \\ \\ 6) \frac{0.24}{0.9} = \frac{24}{100} * \frac{10}{9} = \frac{24}{10*9} = \frac{12}{5*9} = \frac{12}{45} \\ \\ 7) \frac{1}{0.6} =1: \frac{6}{10} =1: \frac{3}{5} = \frac{5}{3} =1 \frac{2}{3} \\ \\ 8) \frac{8}{1.4} =8: \frac{14}{10} = \frac{8*10}{14} = \frac{4*10}{7} = \frac{40}{7} =5 \frac{5}{7}$