If, however, you are trying to determine how much of some component of "A", like a mineral or trace element, you are adding, you need to know the concentration of the component in the solution "A".
For example, if "A" contains five percent of component "Z", multiply the results of the previous calculation by five percent (0.05). So the concentration of component Z would be:
725 / 1022 * 0.05 = 0.035 ppm