Xiaoming’s house used 60 degrees of electricity in October, which is 20 degrees less than last month. What percentage of electricity has been saved compared to last month?
小明家十月份用电60度，比上月节约了20度，比上月节约了用电百分之几？
<gadget id="calculator">60 + 20</gadget>
<output>80</output>

<gadget id="calculator">20 / 80</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>