Problem: 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
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"
annotated_formula: multiply(800, subtract(const_1, divide(20, const_100)))