How much 90% of 40 is greater than 80% of 30?  Choose the correct choice from the following.
A) 12	B) 14	C) 16	D) 17	E) 18

Rationale: "( 90 / 100 ) * 40 – ( 80 / 100 ) * 30 36 - 24 = 12 answer : a"
Answer: A