Question 900833
Ounce, as in {{{1/16}}} of a pound.


Let w = how many ounces to be evaporated.
{{{20*(0.01)/(20-w)=0.05}}}
{{{20*1/(20-w)=5}}}
{{{20=5(20-w)}}}
{{{20=100-5w}}}
{{{20-100=-5w}}}
{{{-80=-5w}}}
{{{w=80/5}}}
{{{highlight(w=16)}}} ounces
OR
{{{highlight(w=1)}}} POUND