cafeteria planned to burn 50 tons of coal in November, but it actually saved 5 tons compared to the plan. What percentage of the plan actually accounted for it?
一个食堂十一月份计划烧煤50吨，实际比计划节约了5吨，实际占计划百分之几？
<gadget id="calculator">50 - 5</gadget>
<output>45</output>

<gadget id="calculator">45 / 50</gadget>
<output>9/10 = around 0.9</output>

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