It is already in its simplest form as 55/36
12/55
28/55 is in its simplest form.
38/55 is in its simplest form.
55/64 is in its simplest form.
55/7 is in its simplest form.
54/55 is in its simplest form.
9/55 is already in simplest form!
56/55 is already in its simplest form
55/12 is already in its simplest form
3/4 + 7/9 = 27/36 + 28/36 = 55/36 which cannot be simplified further.
21/55 is in its simplest form.