Ответ:

  1. а) \(\frac{10xy}{15y}=\frac{2x}{3}\).
  2. б) \(\frac{9ab^2}{9bc^2}=\frac{ab}{c^2}\).
  3. в) \(\frac{2ay^2}{4a^2b}=\frac{y^2}{2ab}\).
  4. г) \(\frac{-6p^2q}{-2q}=3p^2\).
  5. д) \(\frac{24a^2c^2}{36ac}=\frac{2ac}{3}\).
  6. е) \(\frac{63x^2y^3}{42x^6y^4}=\frac{3}{2x^4y}\).