Problem: after decreasing 24 % in the price of an article costs rs . 1216 . find the actual cost of an article ?
Rationale: "cp * ( 76 / 100 ) = 1216 cp = 16 * 100 = > cp = 1600 answer : d"
annotated_formula: divide(1216, subtract(const_1, divide(24, const_100)))