If 30% of a number is equal to one-fourth of another number, what is the ratio of first number to the second number?  Answers:
A) 4 : 7
B) 6 : 5
C) 1 : 2
D) 2 : 3
E) 5 : 6

Rationale: let 30 % of a = 1 / 4 b . then , 30 a / 100 = 1 b / 4 = > 3 a / 10 = 1 b / 4 a / b = ( 1 / 4 * 10 / 3 ) = 5 / 6 a : b = 5 : 6 . answer : e
Answer: E