Two years ago, May Industries issued a bond with nine years until maturity. Currently, the bond sells for $$918.$ The bond has a coupon rate of $7\mathrm{.}5$ percent. What is the percentage yield to maturity of the bond? The company pays coupons semi$-$annually.

$($Note: Round your answer to four decimal places; Use a financial calculator to solve this problem, and document the key sequences entered, like $[$N$],[$PMT$],[$CF$],$ etc.$)$