The expansion of the teaching building of Guangming Primary School originally planned to invest 400,000 yuan, but actually used 360,000 yuan. What percentage of the actual investment was the plan?
光明小学扩建教学楼，原计划投资40万元，实际用了36万元，实际投资是计划的百分之几？
<gadget id="calculator">36 / 40</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>