yes
55
28/55 is in its simplest form.
9/55 is already in simplest form!
It is 55/100. You can simplify that if required.
42/55 is in its simplest form
55/7 is in its simplest form.
36/55 is in its simplest form.
54/55 is in its simplest form.
55/64 is in its simplest form.
38/55 is in its simplest form.
55/21 = 213/21
It is √(55)