If 0.5 of a number is equal to 0.09 of another number, the ratio of the numbers i Pick one:
A) 2 : 3
B) 3 : 4
C) 3 : 20
D) 3 : 7
E) 9 : 50

Rationale: sol . 0.5 a = 0.09 b â ‡ ” a / b = 0.09 / 0.50 = 9 / 50 â ˆ ´ a : b = 9 : 50 . answer e
Answer: E