№ 4. Сократите: 1) $$ \frac{6 \times 14}{7 \times 30} $$; 2) $$ \frac{8 \times 7 + 8 \times 3}{16 \times 25 - 16 \times 5} $$.

1. $$ \frac{6 \times 14}{7 \times 30} = \frac{6 \times 2 \times 7}{7 \times 5 \times 6} = \frac{2}{5} $$
2. $$ \frac{8 \times 7 + 8 \times 3}{16 \times 25 - 16 \times 5} = \frac{8 \times (7 + 3)}{16 \times (25 - 5)} = \frac{8 \times 10}{16 \times 20} = \frac{8 \times 10}{2 \times 8 \times 2 \times 10} = \frac{1}{4} $$

Ответ: 1) $$ \frac{2}{5} $$; 2) $$ \frac{1}{4} $$