1 1/4 - 1/2 = 5/4 - 2/4 = 3/4
1 1/3 - 1/6 = 4/3 - 1/6 = 8/6 - 1/6 = 7/6
1 1/5 - 2/7 = 6/5 - 2/7 = 42/35 - 10/35 = 32/35
1 1/2 - 4/5 = 3/2 - 4/5 = 15/10 - 8/10 = 7/10
1 1/4 - 1/2 = 5/4 - 2/4 = 3/4
1 1/3 - 1/6 = 4/3 - 1/6 = 8/6 - 1/6 = 7/6
1 1/5 - 2/7 = 6/5 - 2/7 = 42/35 - 10/35 = 32/35
1 1/2 - 4/5 = 3/2 - 4/5 = 15/10 - 8/10 = 7/10