Ответ:

  1. \(\frac{8}{25}\cdot\frac{5}{60}=\frac{40}{1500}=\frac{2}{75}\).
  2. \(\frac{5}{6}\cdot\frac{7}{9}=\frac{35}{54}\).
  3. \(\frac{37}{88}\cdot\frac{24}{37}=\frac{24}{88}=\frac{3}{11}\).
  4. \(\frac{27}{56}\cdot\frac{36}{81}=\frac{1}{56}\cdot\frac{36}{3}=\frac{36}{168}=\frac{3}{14}\).