Let’s denote the volume of the solution by V.
According to the problem, the solution contains 8% acid. This means that in every 100 ml of the solution, there are 8 ml of acid.
We know that there are 15 ml of acid in the solution. Using the proportion method, we can set up the following equation:
8 ml acid / 100 ml solution = 15 ml acid / V ml solution
Cross-multiplying, we get:
8 ml acid x V ml solution = 100 ml solution x 15 ml acid
Simplifying, we get:
V ml solution = (100 ml solution x 15 ml acid) / 8 ml acid
V ml solution = 187.5 ml
Therefore, the volume of the solution is 187.5 ml.