hello can you do it with explantion? i already did it and i got 10.11 for i/y so wanna make sure its corrrect and please don't use excel just finance calculator

Peach Corp. issued 15-year bonds two years ago at a coupon rate of 9.9 percent. The bonds make semiannual payments. f these bonds currently sell for 99 percent of par value, what is the YTM? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)