(2,5-2целых 1/3)*(-5целых 1/7)+ 1 целая1/3/(-5,6)

Решите задачу:

$2 \frac{1}{2} - 2 \frac{1}{3} = 2 \frac{3}{6} - 2 \frac{2}{6} = \frac{1}{6}$
$\frac{1}{6} \times ( - 5 \frac{1}{7} ) = - \frac{1}{6} \times \frac{36}{7} = - \frac{6}{7}$
$1 \frac{1}{3} \div ( - 5 \frac{6}{10}) = - \frac{4}{3} \times \frac{10}{56} = \\ = - \frac{10}{42} = - \frac{5}{21}$
$- \frac{6}{7} - \frac{5}{21} = - \frac{18}{21} - \frac{5}{21} = - \frac{23}{21} = \\ = - 1 \frac{2}{21}$