No, it can be simplified further.
It is: 135/216 = 5/8 simplified
135/352 is already in its simplest form
11/90. It cannot be further simplified.
It is: 24/90 = 4/15 simplified
It's 14 over 15.
It is: 90/96 = 15/16 simplified
7/20
no
135/36 = 15/4 = 3.75 or 3 and 3/4
91/135 is already as simple as it gets, as the highest common factor of 91 and 135 is 1.
49/90 cannot be simplified.