Recall that one gallon of liquid is equivalent to 231 cubic inches.
Then, since she has a container that allows to store 550 cubic inches os lemonade, in order to fill the container completely she needs to use the following proportionality:
1 gallon is to 231 cubic in ches, the SAME as X gallons is to 550 cubic inches
In math terms this is written as:
1/231 = X / 550
multiply both sides by 550 to isolate X completely
550 / 231 = X
X = 2.38 gallons
This is the amount on gallons that is needed to fill her container.
Now. If she has to make lemonade in units of one gallon at the time, you would need to answer 3 gallons.
Make sure please to check if they are expecting a decimal number, or if they are expecting a whole number.
Thank you for the image
I see they want you to round the answer to two decimals, then, please type 2.38 in the box.