A dishonest dealer professes to sell goods at the cost price but uses a weight of 723 grams per kg, what is his percent? Choose the correct option:
A) 38.3 %
B) 25 %
C) 77 %
D) 99 %
E) 12 %

Rationale: "723 - - - 277 100 - - - ? = > 38.3 % answer : a"
Answer: A