\( 5 \frac{3}{8} - 1 \frac{1}{2} = \frac{43}{8} - \frac{3}{2} = \frac{43}{8} - \frac{3 \cdot 4}{2 \cdot 4} = \frac{43}{8} - \frac{12}{8} = \frac{31}{8} = 3 \frac{7}{8} \)
Ответ: \(3 \frac{7}{8}\)