Сократить дроби: 12/16, 18/27, 24/56, 42/70.

1. \(\frac{12}{16}=\frac{12\div4}{16\div4}=\frac{3}{4}\).
2. \(\frac{18}{27}=\frac{18\div9}{27\div9}=\frac{2}{3}\).
3. \(\frac{24}{56}=\frac{24\div8}{56\div8}=\frac{3}{7}\).
4. \(\frac{42}{70}=\frac{42\div14}{70\div14}=\frac{3}{5}\).

Ответ: 3/4; 2/3; 3/7; 3/5.