Problem: john makes $ 50 a week from his job . he earns a raise andnow makes $ 90 a week . what is the % increase ?
Rationale: "increase = ( 40 / 50 ) * 100 = ( 4 / 5 ) * 100 = 80 % . d"
annotated_formula: multiply(divide(subtract(90, 50), 50), const_100)