Say we read the question like the below. Can you understand and solve?
Jane made some orange juice. She gave [4 parts out of 5 parts] of it to Ken and had [10 bottles] of juice left. How many [bottles] of orange juice did Jane make?
Left with 1 part is 10 bottles
Has made 5 parts is 50 bottles.
So the same method of solving shall apply whether the question says bottles or packets or kilograms or litre, or if the remainder is 10 bottles or 2 packets or 0.7 kilograms or 6/7 litre.
Like all the rest have mentioned, there is confusion in understanding due to too many fractions. Another technique is try to take step back and simplify the information to understand what the question is saying and asking.
Hope it helps… 🙂