Longquan District plans to build an entertainment park, with a planned investment of 400,000 yuan, but the actual investment is 360,000 yuan. How much is the savings compared to the plan?
龙泉小区计划修建娱乐公园，计划投资40万元，实际投资36万元，比计划节约了百分之几？
<gadget id="calculator">40 - 36</gadget>
<output>4</output>

<gadget id="calculator">4 / 40</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>