You own a portfolio that is $24$ percent invested in Stock $x,39$ percent in Stock $Y,$ and $37$ percent in Stock $Z.$ The expected returns on these three stocks are $10$ percent, $13$ percent, and $15$ percent, respectively. What is the expected return on the portfolio? $($Do not round Intermedlate calculations and enter your answer as a percent rounded to $2$ declmal places, e$.$g$.,3210.)$