Question 741093
32 fluid ounces of water + v fluid ounces of 37% bleach.
Want 5% bleach; how much is v?  


Amount of bleach = v*37
Amount of 5% solution = 32+v
Concentration of 5% solution = 5, as percent


You did not state how the percentage bleach concentration is used.  One might assume you mean weight per volume.


{{{v*37/(v+32)=5}}}
Find v.