The annual interest of depositing 500 yuan of New Year's money in the bank is 12.60 yuan. What is the annual interest rate?
500元压岁钱在银行存一年利息是12.60元，年利率是多少．
<gadget id="calculator">12.6 / 500 / 1</gadget>
<output>0.0252</output>

<result>0.0252</result>