Please read through the entire answer I posted to help you understand :)
Part A:
20% of the restaurant's olive oil supply is 28 quarts.
That means 14 quarts is 10% of the oil supply (dividing 28 by 2 gives us this number).
The number line increases by 10% for each segment. Thus, just add 14 for each box in the number line.
Here's all the values of the number line, notice how each number gets bigger by 14 each time we increase by 10%
0% - 0
10% - 14
20% - 28
30% - 42
40% - 56
50% - 70
60% - 84
70% - 98
80% - 112
90% - 126
100% - 140
Part B:
How many quarts did the restaurant use?
They started with 140 and now they have 28 quarts.
140 - 28 = 112
The restaurant used 112 quarts.
Part C:
They used 112 quarts, and there are 4 quarts in a gallon. Divide 112 quarts by 4 to get the number of gallons.
112/4 = 28
The restaurant used 28 gallons of olive oil.
This should be everything you need; let me know if you need any clarifications. Happy Studying~
