A steel factory originally planned to invest 150,000 yuan to build a new production line, but actually invested 138,000 yuan. How much has the actual investment decreased?
一钢铁厂原计划投资15万元新建一生产线，实际投资了13.8万元，实际投资减少了百分之几？
<gadget id="calculator">15 - 13.8</gadget>
<output>1.2</output>

<gadget id="calculator">1.2 / 15</gadget>
<output>0.08</output>

<result>0.08</result>