Final answer:
Khayla originally had 12.4 quarts of cream before using some to make Mac and cheese. We found this by considering the 9.3 quarts she has left as 75% of the original amount.
Step-by-step explanation:
To determine how many quarts of cream Khayla originally had, we consider the 9.3 quarts she has left as being 75% of the original amount, because she used 25% of it. To find the original quantity, we can set up a proportion where 75% corresponds to the 9.3 quarts. Calculating the 100% (the original amount) is done by dividing the remaining quantity by 75% (or 0.75 in decimal form).
Here is the calculation:
Original amount = 9.3 quarts ÷ 0.75
Original amount = 12.4 quarts
Therefore, Khayla had 12.4 quarts of cream before she used some for the Mac and cheese.