7 out of 50 bottles of a certain brand of canned food are unqualified, what is the qualified rate of this canned food?
某品牌罐头50瓶中有7瓶不合格，这种罐头的合格率是多少．
<gadget id="calculator">50 - 7</gadget>
<output>43</output>

<gadget id="calculator">43 / 50</gadget>
<output>43/50 = around 0.86</output>

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

<gadget id="calculator">(43/50) * 1</gadget>
<output>43/50 = around 0.86</output>

<result>43/50 = around 0.86</result>