45 x ? = 60% of 900
Choose the correct choice from the following answers:
A) 16.2 B) 12 C) 5 D) 500 E) none

Rationale: "answer let 45 x a = ( 60 x 900 ) / 100 ∴ a = ( 60 x 9 ) / 45 = 12 correct option : b"
Answer: B