5/8 because
If you divide 16 by 8 then you get 2 and if you divide 24 by 8 you get 3 this equals=2/3
32/48- If you multiply 16 by 2 you get 32, if you multiply 24 by 2 you get 48 which gives you an answer to 32/48
4/6- If you divide 16 by 4 you get an answer of 4, if you divide 24 by 4 you get an answer of 6, which gives you an answer of 4/6