\( 9 \frac{3}{5} = \frac{9 \cdot 5 + 3}{5} = \frac{45+3}{5} = \frac{48}{5} \)
\( 2 \frac{1}{2} = \frac{2 \cdot 2 + 1}{2} = \frac{4+1}{2} = \frac{5}{2} \)
\( 2 \frac{1}{8} = \frac{2 \cdot 8 + 1}{8} = \frac{16+1}{8} = \frac{17}{8} \)
\( 1 \frac{5}{12} = \frac{1 \cdot 12 + 5}{12} = \frac{12+5}{12} = \frac{17}{12} \)
\( \frac{48}{5} \cdot \frac{5}{2} = \frac{48}{2} = 24 \)
\( \frac{17}{8} : \frac{17}{12} = \frac{17}{8} \cdot \frac{12}{17} = \frac{12}{8} = \frac{3}{2} \)
\( \frac{3}{2} : \frac{1}{4} = \frac{3}{2} \cdot 4 = \frac{12}{2} = 6 \)
\( 24 - 6 = 18 \)
Ответ: 18