Consider the following information concerning three portfolios, the market portfolio, and the risk-free asset: Portfolio Rp OP BP 34% 12.5% 11.5 1.5 1.20 Y 29 Z Market Risk-free 71 10.5 6.2 19 24 0 0.8 1 0 Assume that the correlation of returns on Portfolio Y to returns on the market is 0.68. What is the percentage of Portfolio Y's return that is driven by the market? (Round your answer to 2 decimal places. Omit the "%" sign in your response.) Y's return explained by % market