Carrot Juice Concentrate Help With Math Problem Solving Question?

Help with math problem solving question? - carrot juice concentrate

Bill, a Health Food Avid mixing potions in his basement. Who invented a new drink, which is 40% of carrot juice and 60% other things should be. He walked into the store and found a little carrot juice concentrate () 60% carrot juice. His neighbor is Clara, who decided one day that she dosnt like the carrot juice has already contributed to 80 quarters, 12% carrot juice. How many liters of carrot juice is concentrated, that they add up to 80 liters of juice to drink low to produce perfectly with 40% carrot juice?

Please show work Lil .. Thanksssss