Xiaoli's house saves water this month compared to last month (1/11), then how much water does Xiaoli's house use this month compared to last month.
小丽家这个月比上个月节约用水(1/11)，则小丽家这个月的用水量是上个月的多少．
<gadget id="calculator">1 / 11</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">1 - (1/11)</gadget>
<output>10/11 = around 0.909091</output>

<gadget id="calculator">(10/11) / 1</gadget>
<output>10/11 = around 0.909091</output>

<result>10/11 = around 0.909091</result>