In the "Green Rural Creation" activity, Xiushui Village planned to invest 20,000 yuan, but the actual investment was 18,000 yuan. How much was the actual investment saved compared to the planned investment?
在"绿色农村创建"活动中，秀水村计划投入资金2万元，实际投入资金1.8万元，实际投入资金比计划投入资金节省了百分之几？
<gadget id="calculator">2 - 1.8</gadget>
<output>0.2</output>

<gadget id="calculator">0.2 / 2</gadget>
<output>0.1</output>

<result>0.1</result>