Among the 250 parts processed by Uncle Wang, 15 are unqualified. What is the pass rate?
王叔叔加工的250个零件中，有15个不合格，合格率是多少．
<gadget id="calculator">250 - 15</gadget>
<output>235</output>

<gadget id="calculator">235 / 250</gadget>
<output>47/50 = around 0.94</output>

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

<gadget id="calculator">(47/50) * 1</gadget>
<output>47/50 = around 0.94</output>

<result>47/50 = around 0.94</result>