Help me please I'm really confused ​

Combine the information in the problem and the chart using the average balance method to solve the problem.

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups

Can someone me and explain..will award brainlest!