Let the total number of liters of orange juice and water in the can be x liters. This is 100%.
The can has 1 liter of water and 80% of orange juice. this means that water is 100%-80%=20%.
Now, write
x l - 100%
1 l - 20%,
that is mathematically
[tex]\dfrac{x}{1}=\dfrac{100}{20},\\ \\x=5\ l.[/tex]
If can contains 5 liters of water-juice solution and water is 1 liter, then juice is 4 liters.
Answer: the can contains 1 liter of water and 4 liters of orange juice, 5 l in total.
