Problem: john makes $ 50 a week from his job . he earns a raise and now makes $ 60 a week . what is the % increase ?
Rationale: "increase = ( 10 / 50 ) * 100 = ( 1 / 5 ) * 100 = 20 % . e"
annotated_formula: multiply(divide(subtract(60, 50), 50), const_100)