An 18% salt solution weighing 2 kg was diluted with a glass of water (0.25 kg)

An 18% salt solution weighing 2 kg was diluted with a glass of water (0.25 kg) What concentration of the solution in percent was the result.

Let’s make a proportion:

Let 2 kg – 100%, then X kg – 18%;

Find the mass of salt in the solution:

18 x 2: 100 = 0.36 kg;

Let’s find the amount of water in the solution:

2 – 0.36 = 1.64 kg;
1.64 +0.25 = 1.89 kg is water;
1.89 + 0.36 = 2.25 – solution;

Let’s make a proportion to find the concentration of salt in the solution after adding water:

2.25 – 100%
0.36 – X%
0.36 x 100: 2.25 = 16%

Answer: 16% percentage of the resulting solution.