the answer is 11/14.
55/70 = 11/14
11/15
70/12 = 35/6 = 55/6
28/55 is in its simplest form.
9/55 is already in simplest form!
42/55 is in its simplest form
38/55 is in its simplest form.
55/64 is in its simplest form.
36/55 is in its simplest form.
54/55 is in its simplest form.
55/7 is in its simplest form.
56/55 is already in its simplest form