Guangming Primary School originally planned to invest 800,000 yuan in purchasing teaching equipment, but the actual amount exceeded the original plan by 40,000 yuan. By what percentage?
光明小学购买教学设备，原计划投资80万元，实际比原计划超出4万元，超出几分之几？
<gadget id="calculator">4 / 80</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>