Ответ:
а) \(3\frac{2}{5}:2\frac{7}{10}=\frac{17}{5}:\frac{27}{10}=\frac{17}{5}\cdot\frac{10}{27}=\frac{34}{27}=1\frac{7}{27}\).
б) \(\frac{3,4}{20,4}=\frac{34}{204}=\frac{1}{6}\).
в) \(1\frac{5}{2}:\frac{4}{15}=\frac{7}{2}\cdot\frac{15}{4}=\frac{105}{8}=13\frac{1}{8}\).
г) \(1,17:1\frac{4}{5}=\frac{117}{100}:\frac{9}{5}=\frac{117}{100}\cdot\frac{5}{9}=\frac{13}{20}=0,65\).
Ответ: а) \(1\frac{7}{27}\); б) \(\frac{1}{6}\); в) \(13\frac{1}{8}\); г) \(0,65\).
