Has anyone read the 80000 hours pdf? On page 12 I'm not sure how they arrived at the figure that a single individual needs $40000 of individual income. They say in footnote 9 that it comes from the fact that in an average household, the first single individual accounts for 1 out of 2.5 people, but then they say that using this approximation that individual requires about 53% as much as a typical household. Shouldn't it actually be 1/ 2.5 = 40% as much?

Has anyone read the 80000 hours pdf? On page 12 I'm not sure how they arrived at the figure that a single individual needs $40000 of individual income. They say in footnote 9 that it comes from the fact that in an average household, the first single individual accounts for 1 out of 2.5 people, but then they say that using this approximation that individual requires about 53% as much as a typical household. Shouldn't it actually be 1/ 2.5 = 40% as much?