a) \(\frac{108}{960} = \frac{27}{240} = \frac{9}{80}\)
б) \(\frac{256}{640} = \frac{128}{320} = \frac{64}{160} = \frac{32}{80} = \frac{16}{40} = \frac{8}{20} = \frac{4}{10} = \frac{2}{5}\)
в) \(\frac{360}{840} = \frac{36}{84} = \frac{18}{42} = \frac{9}{21} = \frac{3}{7}\)
г) \(\frac{240}{560} = \frac{24}{56} = \frac{12}{28} = \frac{6}{14} = \frac{3}{7}\)
Ответ: а) \(\frac{9}{80}\), б) \(\frac{2}{5}\), в) \(\frac{3}{7}\), г) \(\frac{3}{7}\)