1/2 + 1/3 + 1/6 + 1/8 + 1/9 + 1/12 = (6/12) + (4/12) + (2/12) + (1/12) + (4/36) + (3/36) = 20/36 = 5/9
1/2 + 1/3 + 1/6 + 1/8 + 1/9 + 1/12 = (6/12) + (4/12) + (2/12) + (1/12) + (4/36) + (3/36) = 20/36 = 5/9