The actual electricity consumption is 15% less than the plan, that is to say, the actual electricity consumption is the planned amount
实际用电比计划节约了15%，也就是说实际用电是计划的多少
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<result>17/20 = around 0.85</result>