There are 500 parts in a batch, and 10 are rejected after inspection. This batch; what is the passing rate of the parts.
一批零件有500个，经检验有10个废品．这批；零件的合格率是多少．
<gadget id="calculator">500 - 10</gadget>
<output>490</output>

<gadget id="calculator">490 / 500</gadget>
<output>49/50 = around 0.98</output>

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

<gadget id="calculator">(49/50) * 1</gadget>
<output>49/50 = around 0.98</output>

<result>49/50 = around 0.98</result>