\[9\frac{17}{36} - 6,65 = 9\frac{17}{36} - 6\frac{65}{100} =\]
\[= 9\frac{17^{\backslash 5}}{36} - 6\frac{13^{\backslash 9}}{20} =\]
\[= 9\frac{85}{180} - 6\frac{117}{180} =\]
\[= 8\frac{265}{180} - 6\frac{117}{180} = 2\frac{148}{180} = 2\frac{37}{45}\]