\[\boxed{\text{П.27.}}\]
\[\textbf{а)}\ 3\ 279 > 899\]
\[\textbf{б)}\ 8\ 423 > 8\ 421\ \]
\[\textbf{в)}\ 0,96 < 1,000\ \]
\[\textbf{г)}\ 231,912 > 31,917\ \]
\[\textbf{д)}\ 2,4 = 2\frac{2}{5}\ \]
\[\textbf{е)}\ \frac{4}{5} = \frac{8}{10} < \frac{9}{10}\ \]
\[\textbf{ж)}\ 2\frac{4}{5} > 2\frac{3}{4}\ \]
\[2\frac{4}{5} = 2\frac{16}{20};\ \ \ \ 2\frac{3}{4} = 2\frac{15}{20}\ \]
\[\textbf{з)}\ 3\frac{3}{5} > 2\frac{8}{10}\ \]
\[\textbf{и)}\ \frac{5}{9} > \frac{1}{3} = \frac{3}{9}\text{\ \ }\]