Consider the following information concerning three portfolios, the market portfolio, and the risk-free asset: Portfolio RP P P X 14.5 % 36 % 1.60 Y 13.5 31 1.30 Z 9.1 21 .80 Market 10.7 26 1.00 Risk-free 5.4 0 0 Assume that the correlation of returns on Portfolio Y to returns on the market is .72. What is the percentage of Portfolio Ys return that is driven by the market? (Enter your answer as a percent rounded to 2 decimal places. Omit the "%" sign in your response.)