Answer:
0.7056 or 70.56%
Explanation:
As there is three portfolios, the market portfolio and the risk free asset are given
Plus the correlation of return on portfolio Y to return on the market is 0.84
So by considering the given information in the question, the percentage of portfolio Y return is
= Correlation of return on portfolio Y to return on the market ^ 2
= 0.84 ^ 2
= 0.7056 or 70.56%