If the store's turnover last year was 400,000 yuan and it paid 20,000 yuan in taxes last year, what was the tax rate last year?
若商店去年的营业额是40万元，去年缴纳税款共2万元，则去年的税率是多少．
<gadget id="calculator">2 / 40</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>