SOLUTION: to 15 liters of milk containing 20% water, 5 liters of pure milk is added. What is the percentage of water in the resultant mixture?

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Question 889549: to
15 liters of milk containing 20% water, 5 liters of pure milk is added. What is the percentage of water in the resultant mixture?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
{water}/{totalMixture}={fractionAsWater}

%2815%2A20%2B5%2A0%29%2F%2815%2B5%29=PercentWater
The emphasis is on the water content, ignoring the content that already comes with the milk.