# math

posted by anonymus

You have a large container of olive oil. You have used 22 1/2 quarts of oil. Twenty-five percent of the olive oil remains. How many quarts of olive oil remain?

1. Damon

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

2. Ms. Sue

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

3. anonymus

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 :/

4. Ms. Sue

22.5 / 0.75 = x / 0.25

Cross multiply and solve for x.

5. anonymus

I got 8.3?

6. Ms. Sue

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

7. Question

Why is 5.626 divided by 7.5

8. Anonymous

Because you have to divide my your quofficent

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