§ Задание 154
\[\boxed{\mathbf{2.}\mathbf{154}}\]

\[\textbf{а)}\ \frac{11^{\backslash 4}}{15} = \frac{44}{60} > \frac{43}{60}\]
\[\textbf{б)}\ \frac{20^{\backslash 10}}{21} = \frac{200}{210} > \frac{27^{\backslash 7}}{30} = \frac{189}{210}\]
\[\boxed{\mathbf{2.}\mathbf{154}}\]

\[\textbf{а)}\ \frac{11^{\backslash 4}}{15} = \frac{44}{60} > \frac{43}{60}\]
\[\textbf{б)}\ \frac{20^{\backslash 10}}{21} = \frac{200}{210} > \frac{27^{\backslash 7}}{30} = \frac{189}{210}\]