You own a portfolio that is 27 percent invested in Stock X, 42 percent in Stock Y, and 31 percent in Stock Z. The expected returns on these three stocks are 12 percent, 15 percent, and 17 percent, respectively. What is the expected return on the portfolio? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Expected return %