Guangming Primary School planned to use 500,000 yuan to purchase a new batch of computers, but actually saved 100,000 yuan. What percentage of the plan was actually used?
光明小学计划用50万元新购一批电脑，实际节约了10万元，实际用的是计划的百分之几？
<gadget id="calculator">50 - 10</gadget>
<output>40</output>

<gadget id="calculator">40 / 50</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>