The power consumption of Hope Elementary School in October is 1200 kWh, and the electricity consumption in September is 1500 kWh. What percentage is the reduction in October compared to September?
希望小学十月份的用电量是1200度，九月份用电量是1500度，十月份比九月份减少百分之几？
<gadget id="calculator">1_500 - 1_200</gadget>
<output>300</output>

<gadget id="calculator">300 / 1_500</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>