factory selects 50 pieces from a batch of products for inspection, and 3 of them are unqualified. What is the pass rate of this batch of products?
某工厂从一批产品中抽取了50件进行检验，其中3件不合格，这批产品的合格率是多少．
<gadget id="calculator">50 - 3</gadget>
<output>47</output>

<gadget id="calculator">47 / 50</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>