After the streamlining of an organization, there are 120 staff members, which is 40 fewer than the original staff. How much is the reduction?
一个机关精简后有工作人员120人，比原来人员少40人，精简了百分之几？
<gadget id="calculator">120 + 40</gadget>
<output>160</output>

<gadget id="calculator">40 / 160</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>