The treasurer of Brandon Blue Sox is seeking a $31,000 loan for 180 days from the Brandon Credit Union. The stated interest rate is 12 percent and there is a 15 percent compensating balance requirement. The treasurer always keeps a minimum of $2,600 in the firm's chequing account. These funds could count toward meeting any compensating balance requirements.

What is the annual rate of interest on this loan?

Annual rate of interest = ?%