- Пусть число равно \(x\). Тогда \(\frac{3}{5}x=\frac{9}{20}\), поэтому \(x=\frac{9}{20}\cdot\frac{5}{3}=\frac{3}{4}\).
- \(x=\frac{3}{16}\cdot\frac{4}{3}=\frac{1}{4}\).
- \(x=\frac{9}{22}\cdot\frac{11}{6}=\frac{3}{4}\).
- \(x=\frac{7}{30}\cdot\frac{15}{4}=\frac{7}{8}\).
- \(x=\frac{5}{12}\cdot\frac{6}{5}=\frac{1}{2}\).
- \(x=\frac{15}{28}\cdot\frac{7}{5}=\frac{3}{4}\).
- \(x=\frac{18}{25}\cdot\frac{10}{3}=\frac{12}{5}\).
- \(x=\frac{32}{81}\cdot\frac{9}{8}=\frac{4}{9}\).
- \(x=\frac{9}{40}\cdot\frac{10}{9}=\frac{1}{4}\).
- \(x=\frac{3}{5}\cdot\frac{9}{7}=\frac{27}{35}\).
- \(x=\frac{1}{4}\cdot\frac{8}{3}=\frac{2}{3}\).
- \(x=\frac{2}{17}\cdot\frac{17}{11}=\frac{2}{11}\).
- \(x=\frac{24}{21}\cdot\frac{49}{32}=\frac{7}{4}\).
- \(x=\frac{55}{27}\cdot\frac{72}{35}=\frac{88}{21}\).
Ответ: 1) \(\frac{3}{4}\); 2) \(\frac{1}{4}\); 3) \(\frac{3}{4}\); 4) \(\frac{7}{8}\); 5) \(\frac{1}{2}\); 6) \(\frac{3}{4}\); 7) \(\frac{12}{5}\); 8) \(\frac{4}{9}\); 9) \(\frac{1}{4}\); 10) \(\frac{27}{35}\); 11) \(\frac{2}{3}\); 12) \(\frac{2}{11}\); 13) \(\frac{7}{4}\); 14) \(\frac{88}{21}\).