Master Wang processes a batch of parts, of which 100 are qualified and 25 are unqualified. What is the pass rate of this batch of parts?
王师傅加工一批零件，其中合格的有100个，不合格的有25个，这批零件的合格率是多少．
<gadget id="calculator">100 + 25</gadget>
<output>125</output>

<gadget id="calculator">100 / 125</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) * 1</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>