Question 891382
The concentration percent would be as mass per volume.  Dimensions must ONLY be in mass and volume.


This lesson deals with these kinds of two part mixture problems:
<a href="http://www.algebra.com/tutors/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev">Mixing two concentrations for known amount of mixture - http://www.algebra.com/tutors/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev</a>


That also contains a general solution.