Problem: when a mobile is sold for rs . 7200 , the owner loses 20 % . at what price must that mobile be sold in order to gain 20 % ?
Rationale: 80 : 7200 = 120 : x x = ( 7200 x 120 ) / 80 = 10800 . hence , s . p . = rs . 10,800 . answer : option c
annotated_formula: floor(multiply(divide(divide(divide(multiply(divide(multiply(7200, const_100), subtract(const_100, 20)), add(const_100, 20)), const_100), const_100), 20), const_2))