\(\boxed{\mathbf{2.417}\mathbf{.\ ОК\ ГДЗ - домашка\ на\ }5}\)
Пояснение.
Решение.
\[\textbf{а)}\ \frac{4}{7}\ :\frac{16}{49} = \frac{4}{7} \cdot \frac{49}{16} = \frac{7}{4} = 1\frac{3}{4}\]
\[\textbf{б)}\ \frac{5}{9}\ :\frac{1}{2} = \frac{5}{9} \cdot 2 = \frac{10}{9} = 1\frac{1}{9}\]
\[\textbf{в)}\ \frac{12}{25}\ :\frac{8}{15} = \frac{12}{25} \cdot \frac{15}{8} = \frac{3 \cdot 3}{5 \cdot 2} =\]
\[= \frac{9}{10}\]
\[\textbf{г)}\ \frac{9}{14}\ :\frac{18}{35} = \frac{9}{14} \cdot \frac{35}{18} = \frac{5}{2 \cdot 2} =\]
\[= \frac{5}{4} = 1\frac{1}{4}\]