\[7\frac{5}{36} - 4,55 = 6\frac{41}{36} - 4\frac{55}{100} =\]
\[= 6\frac{41^{\backslash 5}}{36} - 4\frac{11^{\backslash 9}}{20} =\]
\[= 2\frac{205 - 99}{180} = 2\frac{106}{180} = 2\frac{53}{90}\]