Xiaoqing ate a watermelon (1/9), Xiaoli ate this watermelon (3/9), what percentage of this watermelon did Xiaoli eat more than Xiaoqing?
小青吃了一个西瓜的(1/9)，小丽吃了这个西瓜的(3/9)，小丽比小青多吃了这个西瓜的几分之几？
<gadget id="calculator">3 / 9</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(1/3) - (1/9)</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>