Number field REST API

Number field REST API

I am currently trying to edit a "Incident request" item in ServiceDesk app through REST API. I have success with text and choice fields but get a failure (similar to invalid input xml or no input found) for the number field with following xml

 <parameter><name>Overall % Complete</name><value>2</value></parameter>


I got the name for the field  from the outward json string using REST API again.

{"WORKORDERID":"300204"....,"Overall % Complete":"0","Cost ($)":"0.0","Scheduled Start Time":"","Scheduled End Time":""}


I have similar problem with cost field. Please advice on the input xml format










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