Save electricity in May compared to June (1/5), what is the ratio of electricity consumption in May to June
5月份比6月份节约用电(1/5)，5月份用电与6月份用电的比值是多少
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) / 1</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>