SOLUTION: If a man buys 1 lt of milk for $12 and mixes it with 20% water and sells it for $15, then what is the percentage of gain?

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Question 252810: If a man buys 1 lt of milk for $12 and mixes it with 20% water and sells it for $15, then what is the percentage of gain?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
Where is this liter of milk coming from for $15?
duckbill platypus?
He has gained nothing but a watered down reputation for overcharging!
15-12=3 dollars
3/12 =1/4=.25=25%
The traditional way calculating is 25%