Mr. Li makes 200 pieces of one kind of parts, 10 of which are unqualified, what is the pass rate?
李师傅做一种零件，共做200个，其中10个不合格，合格率是多少．
<gadget id="calculator">200 - 10</gadget>
<output>190</output>

<gadget id="calculator">190 / 200</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>