A production team processed 2000 parts, 15 of which were unqualified. Seeking pass rate.
某生产小组加工了2000个零件，其中15个不合格．求合格率．
<gadget id="calculator">2_000 - 15</gadget>
<output>1_985</output>

<gadget id="calculator">1_985 / 2_000</gadget>
<output>397/400 = around 0.9925</output>

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

<gadget id="calculator">(397/400) * 1</gadget>
<output>397/400 = around 0.9925</output>

<result>397/400 = around 0.9925</result>