Выполните вычитание: 6/7-2/3 11/12-5/6 11/16-5/12 8/21-4/35 7/12-3/8 9/14-19/35

Решите задачу:

$\frac{6}{7} - \frac{2}{3} = \frac{17-14} {21} = \frac{4}{21}$
$\frac{11}{12} - \frac{5}{6} = \frac{11-10}{12} = \frac{1}{12}$
$\frac{11}{16} - \frac{5}{12} = \frac{33-20}{48} = \frac{13}{48}$
$\frac{8}{21} - \frac{4}{35} = \frac{40-12}{105} = \frac{28}{105} = \frac{4}{15}$
$\frac{7}{12} - \frac{3}{8} = \frac{14-9}{24} = \frac{5}{24}$
$\frac{9}{14} - \frac{19}{35} = \frac{45-18}{70} = \frac{27}{70}$