A cricket bat is sold for $900, making a profit of $100. The profit percentage would be Choices.
A) 24 %  B) 12.5 %  C) 30 %  D) 36 %  E) 40 %

Rationale: "100 / ( 900 - 100 ) = 100 / 800 = 0.125 = 12.5 % . answer : b"
Answer: B