Two third is 1/24 larger than five eights because 2/3 - 5/8 = 16/24 - 15/24 = 1/24.
To check, subtract 1/24 from 2/3 and you get 5/8 (2/3 - 1/24 = 16/24 - 1/24 = 15/24 = 5/8)
or add 1/24 to 5/8 and you get 2/3 (5/8 + 1/24 = 15/24 + 1/24 = 16/24 = 2/3)
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