There were 250 staff members in a certain agency, but now there are 210 staff members. How many percent has been reduced?
某机关原有工作人员250人，现在有210人，精简了百分之几？
<gadget id="calculator">250 - 210</gadget>
<output>40</output>

<gadget id="calculator">40 / 250</gadget>
<output>4/25 = around 0.16</output>

<result>4/25 = around 0.16</result>