The supermarket earned a total of 500,000 yuan last month, and the actual income after paying the business tax was 485,000 yuan. What is the business tax rate?
超市上月共收入50万元，缴纳营业税后实际收入48.5万元，营业税率是多少？
<gadget id="calculator">50 - 48.5</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 / 50</gadget>
<output>0.03</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">0.03 * 1</gadget>
<output>0.03</output>

<result>0.03</result>