There are a total of 120 parts in a batch, and 18 are unqualified after inspection. What is the pass rate?
一批零件共有120个，经检验有18个不合格，合格率是多少．
<gadget id="calculator">120 - 18</gadget>
<output>102</output>

<gadget id="calculator">102 / 120</gadget>
<output>17/20 = around 0.85</output>

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

<gadget id="calculator">(17/20) * 1</gadget>
<output>17/20 = around 0.85</output>

<result>17/20 = around 0.85</result>