The electricity consumption of the chemical plant in October is 1/6 lower than that in September, and the electricity consumption in October is the same as that in September.
化工厂10月份用电量比9月份节约(1/6)，10月份是9月份的多少．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>