Question

A milk-man sells milk after mixing water to it to such a extent that water accounts for 20% of
the mixture. If he sells at a mark-up rate of 10%, find his actual profit percentage.
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Answer 1

37.5%

Explanation:

Lets take price of the mixture is 100, which has price of milk as 80 and of water as 20.

Mark up price is 110% of 100 is 110.

Actual price of milk is 80 and selling price is 110, so profit percent is 30/80*100% = 37.5%.