\[\boxed{\mathbf{2.427}}\]
Пояснение.
Решение.
\[\textbf{а)}\ \frac{9}{10} \rightarrow \frac{10}{9}\]
\[\textbf{б)}\ 7 \rightarrow \frac{1}{7}\]
\[\textbf{в)}\ \frac{14}{3} \rightarrow \frac{3}{14}\]
\[\textbf{г)}\ \frac{7}{11} \rightarrow \frac{11}{7}\]
\[\textbf{д)}\ \frac{1}{5} \rightarrow 5\]
\[\textbf{е)}\ 8\frac{13}{15} = \frac{133}{15} \rightarrow \frac{15}{133}\]
\[\textbf{ж)}\ 0,6 = \frac{3}{5} \rightarrow \frac{5}{3}\]
\[\textbf{з)}\ 2,75 = \frac{275}{100} = \frac{11}{4} \rightarrow \frac{4}{11}\]