Produce 200 products, of which 10 are unqualified, what is the pass rate of this batch of products?
生产200件产品，其中不合格的为10件，这批产品的合格率是多少．
<gadget id="calculator">200 - 10</gadget>
<output>190</output>

<gadget id="calculator">190 / 200</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>