Li Ming's family raises 35 chickens, but the number of ducks is 5 less than that of chickens. What percentage of the number of ducks account for chickens?
李明家养鸡35只，养的鸭比鸡少5只，鸭的只数占鸡的几分之几？
<gadget id="calculator">35 - 5</gadget>
<output>30</output>

<gadget id="calculator">30 / 35</gadget>
<output>6/7 = around 0.857143</output>

<result>6/7 = around 0.857143</result>