1. Сократите дроби: 4/6, 7/21, 9/15, 12k/18k

1. Сократите дроби:

1. $$rac{4}{6} = rac{2 cdot 2}{2 cdot 3} = \frac{2}{3}$$
2. $$rac{7}{21} = rac{7 cdot 1}{7 cdot 3} = \frac{1}{3}$$
3. $$rac{9}{15} = rac{3 cdot 3}{3 cdot 5} = \frac{3}{5}$$
4. $$rac{12k}{18k} = rac{6k cdot 2}{6k cdot 3} = \frac{2}{3}$$

Ответ: $$rac{2}{3}$$, $$rac{1}{3}$$, $$rac{3}{5}$$, $$rac{2}{3}$$