5.358 Запишите в виде несократимой дроби: а) \( \frac{7.4}{14.3} \); б) \( \frac{2.9}{9.10} \); в) \( \frac{12}{60}, \frac{99}{22}, \frac{5}{100}, \frac{20}{1000} \)

а) \( \frac{7.4}{14.3} = \frac{7 \cdot 4}{14 \cdot 3} = \frac{28}{42} = \frac{2 \cdot 14}{3 \cdot 14} = \frac{2}{3} \). б) \( \frac{2.9}{9.10} = \frac{2 \cdot 9}{9 \cdot 10} = \frac{18}{90} = \frac{1}{5} \). в) \( \frac{12}{60} = \frac{1}{5} \); \( \frac{99}{22} = \frac{9 \cdot 11}{2 \cdot 11} = \frac{9}{2} \); \( \frac{5}{100} = \frac{1}{20} \); \( \frac{20}{1000} = \frac{2}{100} = \frac{1}{50} \). Ответ: а) \( \frac{2}{3} \), б) \( \frac{1}{5} \), в) \( \frac{1}{5}, \frac{9}{2}, \frac{1}{20}, \frac{1}{50} \).