Answer:
Between oil changes, 3/4 of a quart (or 0.75 quarts) of oil was consumed.
Explanation:
To find out how much oil was consumed between oil changes, you need to calculate the difference between the amount of oil needed to fill up the engine during the first oil change and the amount of oil that drained from the engine during the next oil change.
First oil change: 5 1/4 quarts
Next oil change: 4 1/2 quarts
To find the amount of oil consumed between oil changes, subtract the amount drained during the next oil change from the amount needed during the first oil change:
5 1/4 quarts - 4 1/2 quarts
To subtract these fractions, you'll need to have a common denominator. In this case, it's 4:
5 1/4 quarts - 4 2/4 quarts
Now, subtract the fractions:
(5 - 4) + (1/4 - 2/4) quarts
1 - 1/4 quarts
Now, simplify:
1 - 1/4 = 4/4 - 1/4 = 3/4