The school plans to use 400 kwh of electricity in May, but actually saves 40 kwh of electricity. What percentage of the actual electricity consumption is the original plan?
学校五月份计划用电400度，实际节约用电40度，实际用电量是原计划的百分之几？
<gadget id="calculator">400 - 40</gadget>
<output>360</output>

<gadget id="calculator">360 / 400</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>