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