Assuming you meant 16/56. In its simplest form, it would be 2/7
6 over 56 is 3 over 26 in simplest form because 6/2=3 and 56/2=26.
56/2 = 28
65 out of 56 in simplest form = 19/56
2/3
2/7
1/2
27/56 is the simplest form.
56/71 is in its simplest form.
27/56 is in its simplest form.
56/225 is in its simplest form.
51/56 is in its simplest form.