Uncle Wang sold 80,000 yuan of stock and paid 80 yuan in stamp duty. What is the tax rate of stamp duty?
王伯伯卖出80000元的股票，缴纳印花税80元．印花税的税率是多少？
<gadget id="calculator">80 / 80_000</gadget>
<output>1/1_000 = around 0.001</output>

<result>1/1_000 = around 0.001</result>