Calculates the volume of 1% or 2% solutions of any substance dissolved in water and get a mix of the desired concentration of the substance.

Example: 

Say you have a solution of 2% concentration of a substance and would like to dissolve it in 250ml of water and get a final mixture with 0.7% concentration. 

The app will calculate the volume of the 2% solution that you have to add into water and get the desired 0.7% concentration. In this case it will be 134.62ml!