Question 550769
{{{ .2*10 = 2 }}} gal of acid in 20% solution
{{{ .8*5 = 4 }}} gal of acid in 80% solution
concentration = {{{ ( 2 + 4 ) / ( 10 + 5 ) }}} =
{{{ 6/15 = 2/5 }}}
{{{ 2/5 = 40/100 }}}
The concentration is 40%