Hi Guys and thanks so much for replying to my mail....
The field is a date/time fieid.
By 24 hours, i mean the hours at the time i run the report, when the status of the call is set to resolved.
This was the formula i had before, but it wasn't calculating it correctly.
{sprt_Service_Request.Date/Time Resolved} > (CurrentDateTime - 60 * 60 * 24)
I look forward to a reply soon. Thanks