A workshop of 50 workers produces parts, each producing 10 parts per day. As a result, there are only 5 unqualified parts. What is the pass rate of this batch of parts?
一车间50个工人生产零件，每人每天生产10个零件．结果只有5个不合格，这批零件的合格率是多少．
<gadget id="calculator">50 * 10</gadget>
<output>500</output>

<gadget id="calculator">500 - 5</gadget>
<output>495</output>

<gadget id="calculator">495 / 500</gadget>
<output>99/100 = around 0.99</output>

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

<gadget id="calculator">(99/100) * 1</gadget>
<output>99/100 = around 0.99</output>

<result>99/100 = around 0.99</result>