This month saves electricity consumption (1/8) compared with last month, and this month's electricity consumption is last month's electricity consumption ((())/(())).
本月比上月节约用电(1/8)，本月用电是上月用电的((())/(()))．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/8)</gadget>
<output>7/8 = around 0.875</output>

<result>7/8 = around 0.875</result>