Question 1108892
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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

{{{(0.8p)/(p-x)=0.88}}}

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{{{0.8p=0.88(p-x)}}}
{{{0.8p=0.88p-0.88x}}}
{{{-0.08p=-0.88x}}}
{{{x=(0.08/0.88)p}}}
{{{x=8/88=1/11}}}
{{{x=1/11}}}


If start with 1 unit of the milk-and-water mixture, evaporate {{{1/11}}} unit of water from it, to obtain your "12%" water result.