Сократите дробь: a) $$rac{7}{35}$$; б) $$rac{6}{14}$$; в) $$rac{18}{21}$$

а) $$rac{7}{35} = rac{7:7}{35:7} = rac{1}{5}$$

б) $$rac{6}{14} = rac{6:2}{14:2} = rac{3}{7}$$

в) $$rac{18}{21} = rac{18:3}{21:3} = rac{6}{7}$$

Ответ: a) $$rac{1}{5}$$, б) $$rac{3}{7}$$, в) $$rac{6}{7}$$