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

December 30, 2020 | education

| **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%