4 kg of water was added to a container containing 12 kg of an 8% solution

4 kg of water was added to a container containing 12 kg of an 8% solution of the substance. What percentage is the concentration of the resulting solution?

According to the condition of this task, it is required to perform a calculation and determine the percentage of solution concentration.

Initially, we determine the mass of a substance in a solution:

12 kg / 100 * 8 = 0.96 kg;

Now let’s calculate how much the solution became in the container after adding water?

12 + 4 = 16 kg;

Determine the resulting percentage of the concentration of the solution. To do this, let’s make a proportion:

16 kg -> 100%;

0.96 kg -> x%;

We solve using the cross method:

x = 0.96 * 100/16 = 6%;

Answer: the solution became 6%.