A parts processing factory processed 300 parts, 15 of which were unqualified. What is the pass rate of this batch of parts?
一个零件加工厂加工了300个零件，其中有15个不合格．这批零件的合格率是多少？
<gadget id="calculator">300 - 15</gadget>
<output>285</output>

<gadget id="calculator">285 / 300</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>