To a solution of salt weighing 300 g with a mass fraction of 15% was added salt weighing 40 g.

To a solution of salt weighing 300 g with a mass fraction of 15% was added salt weighing 40 g. Find the mass fraction of salt in the new solution.

You can make up the proportion.
300g-15%
340g%
We get:
x = (15 * 340): 300
x = 17
Find the mass fraction of salt in the new solution
Answer: 17%



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