A dishonest dealer professes to sell goods at the cost price but uses a weight of 900 grams per kg, what is his percent?  Select the correct option:
A) 11.11 %	B) 25 %	C) 22 %	D) 29 %	E) 45 %

Rationale: "900 - - - 100 100 - - - ? = > 11.11 % answer : a"
Answer: A