A 5 litre jug contains 4 litres of a salt water solution that is 15 percent salt. If 1.5 litres of the solution spills out of the jug, and the jug is then filled to capacity with water, approximately what percent of the resulting solution in the jug is salt?

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1. 5 litre jug contains 4 litres of salt water solution
   with 15% of salt, that means it has 4000*.15 = 600 ml salt
   in it.
   If 1.5 litres solution is spills out, remaining solution
   is 2.5 litres, then the salf content is 2500*.15 = 375ml.
   Now, the jug is filled to full capacity with water i.e.,
   now the jug has 5 litre solution in it.
   Now, the salt content is 375/5000 = 7.5%

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2. 7.5%

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