766. Сократите дроби по образцу: д) 12/18, 18/20, 20/24, 24/30;

\(\frac{12}{18}=\frac{12:6}{18:6}=\frac{2}{3}\); \(\frac{18}{20}=\frac{18:2}{20:2}=\frac{9}{10}\); \(\frac{20}{24}=\frac{20:4}{24:4}=\frac{5}{6}\); \(\frac{24}{30}=\frac{24:6}{30:6}=\frac{4}{5}\).

Ответ: \(\frac{2}{3};\ \frac{9}{10};\ \frac{5}{6};\ \frac{4}{5}\).