Yes
120 over 39 in simplest form = 40/13 or 31/13
10 over 39
39/40
39/40 is in its simplest form.
40/81 is in its simplest form.
171/40 is in its simplest form.
37/40 is in its simplest form.
40/49 is in its simplest form.
40/403 is in its simplest form.
11 over 40 is its simplest form
40/17 is in its simplest form.
40/27 is in its simplest form.