The cost price of a radio is Rs.2400 and it was sold for Rs.2100, find the loss %?	Choose the correct choice:
A) 12.5 %	B) 11 %	C) 13 %	D) 15 %	E) 12.8 %

Rationale: "2400 - - - - 300 100 - - - - ? = > 12.5 % answer : a"
Answer: A