Master Li processed 80 parts, 4 of which were unqualified. What is the pass rate of this batch of parts?
李师傅加工了80个零件，其中4个不合格．这批零件的合格率是多少？
<gadget id="calculator">80 - 4</gadget>
<output>76</output>

<gadget id="calculator">76 / 80</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>