1/4 = 3/12, 6/24, 9/36, 12/48,
1/3 = 4/12, 8/24, 12/36, 16/48
1/4 < 7/24, 5/18, 11/36, 13/48, 5/16, ... < 1/3
1/4 = 3/12, 6/24, 9/36, 12/48,
1/3 = 4/12, 8/24, 12/36, 16/48
1/4 < 7/24, 5/18, 11/36, 13/48, 5/16, ... < 1/3