Problem: a worker ' s daily wage is increased by 50 % and the new wage is $ 30 per day . what was the worker ' s daily wage before the increase ?
Rationale: let x be the daily wage before the increase . 1.5 x = $ 30 x = $ 20 the answer is c .
annotated_formula: divide(30, add(const_1, divide(50, const_100)))