\[4,85 - 2\frac{13}{24} = 4\frac{85}{100} - 2\frac{13}{24} =\]
\[= 4\frac{17^{\backslash 6}}{20} - 2\frac{13^{\backslash 5}}{24} =\]
\[= 2\frac{102 - 65}{120} = 2\frac{37}{120}\]