45 x ? = 25% of 900  Choose one
A) 16.2 B) 4 C) 5 D) 500 E) none

Rationale: "answer let 45 x a = ( 25 x 900 ) / 100 ∴ a = ( 25 x 9 ) / 45 = 5 correct option : c"
Answer: C