After the streamlining of a certain agency, there are 143 staff members, which is 57 fewer than the original number. How much has the staff of this institution been streamlined?
某机关精简机构以后有工作人员143人，比原来人数减少了57人．这个机关的工作人员精简了多少．
<gadget id="calculator">143 + 57</gadget>
<output>200</output>

<gadget id="calculator">57 / 200</gadget>
<output>57/200 = around 0.285</output>

<result>57/200 = around 0.285</result>