Xiaoqing's family has a flock of chickens, among which hens account for 7/9 of the total, and the rest are roosters. What percentage of the total are hens more than roosters?
小青家养了一群鸡，其中母鸡占总数的(7/9)，其余的是公鸡．母鸡比公鸡多占总数几分之几？
<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">1 - (7/9)</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(7/9) - (2/9)</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>