a doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 105 pounds . if the typical dosage is 2 cubic centimeters per 15 pounds of the body weight , by what percent was the prescribed dosage greater than the typical dosage ?
"typical dosage is dose : weight : : 2 : 15 . now if weight is 105 ( multiplying factor is 7 : ( 105 / 15 ) ) then typical dosage would be 2 * 7 = 14 cc . dosage = 18 cc . dosage is greater by 2 cc . % dosage is greater : ( 2 / 14 ) * 100 = 14.28 % e is the answer ."
multiply(divide(subtract(multiply(divide(2, 15), 105), 18), multiply(divide(2, 15), 105)), const_100)