The school organized electricity saving activities. In September, the electricity consumption was 100 kwh, and the electricity consumption in October was 10 kWh less than that in September. What percentage was saved?
学校组织节约用电活动，九月份用电100度，十月份用电比九月份节约了10度，节约了百分之几？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

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