SOLUTION: water is 20% the mixture of milk and water now how much water must be evaporated in the mixture then Water could be remain 12% in mixture

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Question 1108892: water is 20% the mixture of milk and water now how much water must be evaporated in the mixture then Water could be remain 12% in mixture
Answer by josgarithmetic(39617) About Me  (Show Source):
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water is 20% the mixture of milk and water now how much water must be evaporated in the mixture then Water could be remain 12% in mixture
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"Milk", 80%;
After evaporation of some water, "milk" 88%

p, original amount of milk-water mixture
x, water to remove
%280.8p%29%2F%28p-x%29=0.88
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0.8p=0.88%28p-x%29
0.8p=0.88p-0.88x
-0.08p=-0.88x
x=%280.08%2F0.88%29p
x=8%2F88=1%2F11
x=1%2F11

If start with 1 unit of the milk-and-water mixture, evaporate 1%2F11 unit of water from it, to obtain your "12%" water result.