Problem: if the cost price of 20 articles is same as the selling price of 25 articles . find the gain or loss percentage ?
Rationale: "explanation : 20 cp = 25 sp cost price cp = 25 selling price sp = 20 formula = ( sp - cp ) / cp * 100 = ( 20 - 25 ) / 25 * 100 = 20 % loss answer : option a"
annotated_formula: multiply(const_100, divide(subtract(const_100, divide(multiply(const_100, 25), 20)), divide(multiply(const_100, 25), 20)))