Save this month compared to last month (1/12), how much is this month compared to last month
这个月比上个月节约(1/12)，这个月是上个月的多少
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 - (1/12)</gadget>
<output>11/12 = around 0.916667</output>

<result>11/12 = around 0.916667</result>