A factory produces a batch of parts. The ratio of qualified products to unqualified products is 19:1. What is the pass rate of this batch of parts?
某工厂生产了一批零件，合格的产品与不合格的产品数量比是19：1，这批零件的合格率是多少．
<gadget id="calculator">19 + 1</gadget>
<output>20</output>

<gadget id="calculator">19 / 20</gadget>
<output>19/20 = around 0.95</output>

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

<gadget id="calculator">(19/20) * 1</gadget>
<output>19/20 = around 0.95</output>

<result>19/20 = around 0.95</result>