Ответ:

  1. \(\frac{9}{45}=\frac{9:9}{45:9}=\frac{1}{5}\).
  2. \(\frac{8}{18}=\frac{8:2}{18:2}=\frac{4}{9}\).
  3. \(\frac{16}{24}=\frac{16:8}{24:8}=\frac{2}{3}\).

Ответ: а) \(\frac{1}{5}\); б) \(\frac{4}{9}\); в) \(\frac{2}{3}\).