Ответ:

Делим числитель и знаменатель каждой дроби на их общий делитель.

  1. \(\frac{9}{27}=\frac{1}{3}\); \(\frac{8}{20}=\frac{2}{5}\); \(\frac{10}{24}=\frac{5}{12}\); \(\frac{15}{25}=\frac{3}{5}\); \(\frac{12}{32}=\frac{3}{8}\).
  2. \(\frac{24}{42}=\frac{4}{7}\); \(\frac{18}{36}=\frac{1}{2}\); \(\frac{4}{24}=\frac{1}{6}\); \(\frac{90}{150}=\frac{3}{5}\); \(\frac{24}{200}=\frac{3}{25}\).
  3. \(\frac{100}{145}=\frac{20}{29}\); \(\frac{15\cdot14}{25\cdot16}=\frac{3\cdot14}{5\cdot16}=\frac{42}{80}=\frac{21}{40}\); \(\frac{12\cdot15}{25\cdot16}=\frac{3\cdot15}{25\cdot4}=\frac{45}{100}=\frac{9}{20}\).

Ответ: \(\frac{1}{3};\frac{2}{5};\frac{5}{12};\frac{3}{5};\frac{3}{8};\frac{4}{7};\frac{1}{2};\frac{1}{6};\frac{3}{5};\frac{3}{25};\frac{20}{29};\frac{21}{40};\frac{9}{20}\).