If y is 90% greater than x, than x is what % less than y?
Pick.
A) 35.7 %  B) 39.8 %  C) 43.2 %  D) 47.4 %  E) 51.2 %

Rationale: "y = 1.9 x x = y / 1.9 = 10 y / 19 x is 9 / 19 less which is 47.4 % less than y . the answer is d ."
Answer: D