The actual electricity consumption of a textile factory in April was 3600 kWh, which was 400 kWh less than the plan, and how much was the saving compared to the plan?
某纺织厂四月份实际用电3600度，比计划节约了400度，比计划节约了百分之几？
<gadget id="calculator">3_600 + 400</gadget>
<output>4_000</output>

<gadget id="calculator">400 / 4_000</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>