The Shunmin Leather Shoe Factory randomly inspects 500 pairs of leather shoes, and 6 pairs of leather shoes are unqualified. Find the passing rate of the leather shoes.
顺民皮鞋厂抽检500双皮鞋，有6双皮鞋不合格，求皮鞋的合格率．
<gadget id="calculator">500 - 6</gadget>
<output>494</output>

<gadget id="calculator">494 / 500</gadget>
<output>247/250 = around 0.988</output>

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

<gadget id="calculator">(247/250) * 1</gadget>
<output>247/250 = around 0.988</output>

<result>247/250 = around 0.988</result>