Answer
Mass fraction= 0.0745
Weight percent= 7.45%
Work Step by Step
Mass of ethylene glycol=
density$\times$ volume= $1.11 g/mL\times14.5 mL=16.1 \,g$
Mass fraction of ethylene glycol=
$\frac{mass\, of\, ethylene\, glycol}{mass\,of\, ethylene\, glycol+mass\,of\,H_{2}O}=\frac{16.1\,g}{16.1\,g+200\,g}$
$=0.0745$
Weight percent= mass fraction$\times100\%$
$=0.0745\times100\%=7.45\%$
