A liter of orange fruit drink contains 22% orange juice. How many millimeters of orange juice must be added to produce a mixture containing 50% orange juice?

Answer 1

OJ is not measured in millimeters.

You probably mean milliliters (ml)

Your original liter of fruit drink contains 780 ml of water and 220 of OJ. You want to add X ml of OJ so that

220 + X = (1/2)(1000 + X)
X/2 = 500 - 220 = 280
X = 560 ml

Answer 2

Didn't understand

Answer 3

Is’n it supposed to be of percentage?