The PW-based relation for the incremental cash flow series to find i* between the lower first-cost alternative X and alternative Y has been developed. 0 = -32,000 + 9000(P/A,i*,10) + ( -3000(P/F,i*,10)) Determine the highest MARR value for which Y is preferred over X.

Any MARR value greater than ____% favors Y.