Wait, i think that the 1 in 72 is right because the first one is 6/32 which is rounded up to 1/6, then 5/32, which is rounded up to 1/7, then 4/32 which is 1/8, then 3/32, which is rounded up to 1/11, then 2/32 which is 1/16, then 1/31, which is 1/31, then we add the denominators, to get 72, so...