Ответ:

  1. \(\frac{8b}{24c}=\frac{b}{3c}\).
  2. \(\frac{5ay}{15by}=\frac{a}{3b}\).
  3. \(\frac{4a^2}{6ac}=\frac{2a}{3c}\).
  4. \(\frac{7x^2y}{21xy^2}=\frac{x}{3y}\).
  5. \(\frac{a^5b^3}{a^3b^5}=\frac{a^2}{b^2}\).
  6. \(\frac{x^6y^4}{x^4y^6}=\frac{x^2}{y^2}\).
  7. \(\frac{56m^2n^5}{35mn^5}=\frac{8m}{5}\).
  8. \(\frac{25p^4q}{100p^5q}=\frac{1}{4p}\).

Ответ: а) \(\frac{b}{3c}\); б) \(\frac{a}{3b}\); в) \(\frac{2a}{3c}\); г) \(\frac{x}{3y}\); д) \(\frac{a^2}{b^2}\); е) \(\frac{x^2}{y^2}\); ж) \(\frac{8m}{5}\); з) \(\frac{1}{4p}\).