Use the$$ add$-$on method for determining interest on a loan of $$$$2510,$ with an annual rate of $12\%$ and a term of $4$ years.$$ Then, determine the annual interest rate during the last month of the loan.

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Part $1$

During the last month of the$$ loan, the annual interest rate is

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enter your response here$\%.$

$($Type a whole$$ number.$)$