Yes, it can.
27/98
98/396 = 49/198.
No, 10/49 is simplified.
11/98 cannot be simplified further.
It is: 49/50
42/49
18/196 = 9/98
198
In its simplest form - it would be 49/50.
196/270 = 98/135
The greatest common factor of the numbers 5, 98 and 198 is 1.