Li Ming deposits 500 yuan in the bank, and gets back the principal and interest of 537.35 yuan after one year. Find the annual interest rate.
李明把500元存入银行，一年后取回本息537.35元，求年利率．
<gadget id="calculator">537.35 - 500</gadget>
<output>37.35</output>

<gadget id="calculator">37.35 / 500 / 1</gadget>
<output>0.0747</output>

<result>0.0747</result>