If y is 80% greater than x, than x is what % less than y?  Pick.
A) 20  B) 25  C) 33 1 / 3  D) 44 4 / 9  E) 80

Rationale: "let x = 100 so y = 180 we want percentage change . so , ( 100 - 180 ) / 180 = - 44.44 % = 44 4 / 9 % lesser than y . hence option ( d ) ."
Answer: D