Problem: the annual interest rate earned by an investment increased by 10 percent from last year to this year . if the annual interest rate earned by the investment this year was 12.5 percent , what was the annual interest rate last year ?
Rationale: "12.5 = 1.1 * x x = 11.36 % answer d )"
annotated_formula: divide(multiply(12.5, const_100), add(12.5, const_100))