Xiaoming’s family used 120 kWh of electricity in July this year, and 102 kWh of electricity in August. How much electricity was saved in August compared to July?
小明家今年7月份用电120度，8月份用电102度，8月份比7月份节约用电多少．
<gadget id="calculator">120 - 102</gadget>
<output>18</output>

<gadget id="calculator">18 / 120</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>