2/3 + 5/8 = 16/24 + 15/24 = 31/24 = 1 7/24
4/5 - 2/3 + 4/15 = 12/15 - 10/15 + 4/15 = 6/15 = 2/5
12 3/8 + 8 1/6 = 12 9/24 + 8 4/24 = 20 13/24
5 - 7/16 = 4 16/16 - 7/16 = 4 9/16
2/3 + 5/8 = 16/24 + 15/24 = 31/24 = 1 7/24
4/5 - 2/3 + 4/15 = 12/15 - 10/15 + 4/15 = 6/15 = 2/5
12 3/8 + 8 1/6 = 12 9/24 + 8 4/24 = 20 13/24
5 - 7/16 = 4 16/16 - 7/16 = 4 9/16