Aunt Li’s house used 120 kWh of electricity in March and 150 kWh of electricity in April. How much did their house’s electricity consumption increase in April compared to March?
李阿姨家三月份用电120度，四月份用电150度，他们家四月份用电比三月份增长了百分之几？
<gadget id="calculator">150 - 120</gadget>
<output>30</output>

<gadget id="calculator">30 / 120</gadget>
<output>1/4 = around 0.25</output>

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