Question

18:30::36:54 is ths correct

Answer 1

A : B :: C :D
then,

A/B = C/D

now,

given,

18 : 30 : : 36 : 54

18/30 = 3//5

36/54 = 2/3

but 3/5 ≠ 2/3
so , this statement is wrong .

Answer 2

it doesn't correct because
18:30::36:54
18:30=3/5
36:54=2/3
3/5¥2/3
so,