If 15% of A is the same as 30% of B, then A : B is :
Choose the correct choice.
A) 1 : 4  B) 4 : 3  C) 6 : 7  D) 3 : 5  E) 2 : 1

Rationale: expl : 15 % of a i = 30 % of b = 15 a / 100 = 30 b / 100 = 2 / 1 = 2 : 1 answer : e
Answer: E