The factory quality inspection randomly inspected parts, 38 of them passed and 2 failed. Find the pass rate.
工厂质量检查抽检零件，有38个及格，有2个不及格．求及格率．
<gadget id="calculator">38 + 2</gadget>
<output>40</output>

<gadget id="calculator">38 / 40</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>