Xiaojun's phone bill was 50 yuan last month, and 38 yuan this month. How much is the savings this month compared to last month?
小军家上月电话费50元，本月电话费38元．本月比上月节约百分之几？
<gadget id="calculator">50 - 38</gadget>
<output>12</output>

<gadget id="calculator">12 / 50</gadget>
<output>6/25 = around 0.24</output>

<result>6/25 = around 0.24</result>