Problem: an inspector rejects 15 % of the meters as defective . how many will he examine to reject 15 ?
Rationale: "then , 15 % of x = 15 ( 15 / 100 ) x = 15 x = ( 15 * 100 * ) / 15 = 100 answer is a"
annotated_formula: divide(multiply(15, const_100), 15)