Ответ:

  1. \(\frac{2\cdot3}{2\cdot5}=\frac{3}{5}\).
  2. \(\frac{5\cdot7}{3\cdot5}=\frac{7}{3}\).
  3. \(\frac{3\cdot7}{6\cdot5}=\frac{7}{10}\).
  4. \(\frac{9\cdot5}{7\cdot3}=\frac{15}{7}\).
  5. \(\frac{8\cdot3}{6\cdot24}=\frac{1}{6}\).
  6. \(\frac{5\cdot27}{18\cdot15}=\frac{1}{2}\).

Ответ: \(\frac{3}{5};\ \frac{7}{3};\ \frac{7}{10};\ \frac{15}{7};\ \frac{1}{6};\ \frac{1}{2}\).