23 over 69 in the simplest form would be 1 over 3 because you have to divide both the top (23) of the fraction and the bottom (69) of the fraction by the same number, which in this case would be 23! 23/23 is 1 and 69/23 is 3....so 23/69 is 1/3! Hope I helped!
69 over 87 = 23/29
15/69 = 5/23 in its simplest form.
63/69 = 21/23
23 over 15
23/24
16/23
12/23
10/23.
23/36
17/23
23/36
13/23