A man buys an item at Rs. 800 and sells it at the loss of 20 percent. Then what is the selling price of that item	Choose the correct choice from the following choices.
A) rs . 640  B) rs . 760  C) rs . 860  D) rs . 960  E) none of these

Rationale: "explanation : here always remember , when ever x % loss , it means s . p . = ( 100 - x ) % of c . p when ever x % profit , it means s . p . = ( 100 + x ) % of c . p so here will be ( 100 - x ) % of c . p . = 80 % of 800 = 80 / 100 * 800 = 640 option a"
Answer: A