Помогите решить: 1) ( 1,25 - 1 1/3 )* (-5 1/7) - 1 1/6 : 5 4/9 =

Решите задачу:

$(1,25-1\frac{1}{3})*(-5\frac{1}{7})-1\frac{1}{6}:5\frac{4}{9}= \\ \\ 1)1,25-1\frac{1}{3}=1\frac{25}{100}-1\frac{1}{3}=1\frac{1}{4}-1\frac{1}{3}=\frac{5}{4}-\frac{4}{3}=\frac{5*3-4*4}{12}=\frac{15-16}{12}=-\frac{1}{12} \\ \\ 2)(-\frac{1}{12})*(-5\frac{1}{7})=\frac{1}{12}*\frac{36}{7}=\frac{3}{7} \\ \\ 3)1\frac{1}{6}:5\frac{4}{9}=\frac{7}{6}:\frac{49}{9}=\frac{7}{6}*\frac{9}{49}=\frac{3}{14} \\ \\ 4)\frac{3}{7}-\frac{3}{14}=\frac{3*2-3}{14}=\frac{3}{14}$