Problem: a dealer purchases 15 articles for rs . 25 and sells 12 articles for rs . 30 . find the profit percentage ?
Rationale: "l . c . m of 15 and 12 = 60 cp of 60 articles = rs . 100 ( 25 * 4 ) sp of 60 articles = rs . 150 ( 30 * 5 ) profit percentage = ( 150 - 100 ) / 100 * 100 = 50 % answer : b"
annotated_formula: subtract(multiply(30, add(const_4, const_1)), multiply(25, const_4))