24 + 3
= 27/21 = 9/7 = 1 2/7
24 - 3
15 + 6
= 21/9 = 7/3 = 2 1/3
15 - 6
12 - 3
= 9/15 = 3/5
12 + 3
26 + 2
= 28/24 = 7/6 = 1 1/6
26 - 2
