18. Bill has 2/3 of a gallon of juice left in the container. He pours out 2/9 for his brother. Which expression will yield the amount of juice left in the
container?

4/9 of a gallon.

Step-by-step explanation:

Given that Bill has 2/3 of a gallon of juice in his container, and he pours out 2/9 to his brother, to determine the expression that will yield the amount of juice left in the container, the following calculation must be performed:

2/3 - 2/9 = X

2/3 = 6/9

6/9 - 2/9 = X

4/9 = X

So after serving his brother juice, Bill has 4/9 of a gallon of juice left.