7) \(3\frac{5}{12}-\frac{7}{24}\)

\(\frac{5}{12}=\frac{10}{24}\).

\(3\frac{5}{12}-\frac{7}{24}=3+\frac{10}{24}-\frac{7}{24}=3\frac{3}{24}=3\frac{1}{8}\).

Ответ: \(3\frac{1}{8}\).