math
posted by anonymus .
You have a large container of olive oil. You have used 22 1/2 quarts of oil. Twentyfive percent of the olive oil remains. How many quarts of olive oil remain?

22.5 quarts = .75 (total)
total = 22.5/.75
we have .25 * total
so we have .25 * 22.5/.75
=22.5/3
= 7.5 
0.75x = 22.5
x = 22.5 / 0.75
x = 30.4 gallons is the capacity of the container
30.4  22.5 = _______ remaining quarts 
Thank you so much but can you please put it in with the proportion set up? I just learned this from school and my teacher wants me to write the proportion set up for extra credit and I do not know how :/

22.5 / 0.75 = x / 0.25
Cross multiply and solve for x. 
I got 8.3?

22.5 / 0.75 = x / 0.25
0.75x = 0.25 * 22.5
0.75x = 5.62
x = 5.625 / 0.75
x = 7.5 
Why is 5.626 divided by 7.5
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