50% of a number is more than 40% of 120 by 180. Find the number? Pick.
A) 456  B) 480  C) 420  D) 445  E) 320

Rationale: "( 50 / 100 ) * x – ( 40 / 100 ) * 120 = 180 1 / 2 x = 228 x = 456 answer : a"
Answer: A