\[\frac{11}{12} - y = \frac{11}{24}\]
\[y = \frac{11^{\backslash 2}}{12} - \frac{11}{24}\]
\[y = \frac{22 - 11}{24}\]
\[y = \frac{11}{24}.\]
\[Ответ:\ y = \frac{11}{24}.\]