What equations have a constant of proportionality equal to 333?

Which equation has a constant of proportionality equal to 333?

(Choice A) A y=\dfrac{8}{5}xy= 5 8 ​ xy, equals, start fraction, 8, divided by, 5, end fraction, x (Choice B) B y=\dfrac{1}{3}xy= 3 1 ​ xy, equals, start fraction, 1, divided by, 3, end fraction, x (Choice C) C y=\dfrac{1}{4}xy= 4 1 ​ xy, equals, start fraction, 1, divided by, 4, end fraction, x (Choice D) D y=\dfrac{18}{6}xy= 6 18 ​ xy, equals, start fraction, 18, divided by, 6, end fraction, x

20: 5

explanation:

about 20% of the world's population lives in   southwest asia, but on less than 5% of the world's   land area.