Yes
It is: 11.25/45 = 1/4 simplified
45/36 = 15/12 = 5/4
It is: 36/45 = 4/5 simplified
16/45 cannot be simplified.
53/45 cannot be simplified further.
45/63 is 5/7 simplified
It is: 45/1000 = 9/200 simplified
Both can be divided by 5. 4/9
It is: 1281/45 = 427/15 simplified
It is: 45/171 = 5/19 simplified
It is 2/9 simplified