A mixture is 25% red paint, 30% yellow paint, and 45%water. If 4 quarts of red paint are added to 20 quarts of the mixture, what is the percentage of red paint in the new mixture?
A mixture is 25% red paint, 30% yellow paint, and 45%water. If 4 quarts of red paint are added to 20 quarts of the mixture, what is the percentage of red paint in the new mixture?
You're starting with 20 quarts, 25% of which is red,
therefore the original mixture contains 5 quarts of red.
You add 4 quarts of red to the 20, making 24 quarts
in the new mixture, which now contains 9 quarts of red.
9 / 24 = 37.5% red in the new mixture.
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