12/23
69/28 is in its simplest form.
69/100 is already in simplest form.
You can't simplify that; 69 and 50 have no common factor.
69 over 87 = 23/29
69
15/69 = 5/23 in its simplest form.
63/69 = 21/23
It is: 138/20 = 69/10 in its simplest form
23 over 15
It is already simplified.
23/24