Question 989204
{{{ .4*4.5 = 1.8 }}} ml of salt in 40% solution
concentration = {{{ 1.8 / ( 4.5 + 2.7 ) = 1.8 / 7.2 }}}
{{{ 1.8 / 7.2 = 1/4 }}}
{{{ .25*100 = 25 }}}
The concentration is 25%