a doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 115 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 115 : ( 115 / 15 ) ) then typical dosage would be 2 * 7.67 = 15.33 cc . dosage = 18 cc . dosage is greater by 2 cc . % dosage is greater : ( 2 / 15.33 ) * 100 = 13.03 % e is the answer ."
multiply(divide(subtract(multiply(divide(2, 15), 115), 18), multiply(divide(2, 15), 115)), const_100)