The expansion and decoration of a shopping mall planned to invest 500,000 yuan, but the actual cost was only 380,000 yuan. How much was the savings?
某商场扩建装修，计划投资50万元，实际只用了38万元，节约了百分之几？
<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>