5 liters of a 20 percent solution of alcohol in water are mixed with 3 liters of a 12 percent alcohol in water solution . what is the percentage of alcohol in the new solution ?
"the total amount of alcohol is 0.2 ( 5 ) + 0.12 ( 3 ) = 1.36 liters . the percentage is 1.36 / 8 = 136 / 800 = 17 / 100 which is 17 % the answer is b ."
multiply(divide(add(multiply(5, divide(20, const_100)), multiply(divide(12, const_100), multiply(5, divide(20, const_100)))), add(5, 3)), const_100)