A bottle is 80% full. The liquid in the bottle consists of 60% orange
juice and 40% mango juice. If the remainder of the bottle is filled with
200ml of pineapple juice, how much mango juice is in the bottle?
The bottle is 80% full. Now the bottle is filled with 200ml of pineapple
juice. It mean's 20% represent 200ml. So 40% in 400ml.