Problem: if 35 % of a number is 12 less than 50 % of that number , then the number is ?
Rationale: "let the number be x . then , 50 % of x - 35 % of x = 12 50 / 100 x - 35 / 100 x = 12 x = ( 12 * 100 ) / 15 = 80 . answer : d"
annotated_formula: divide(12, divide(subtract(50, 35), const_100))