Help with Oracle Query

How to get percentage for the numbers in the Qty Column? Can someone please help.


select (SET) as Part_Number ,(COUNT (1)) AS Qty
from US8 where CTYPE = 'DPPO' AND STYPE ='STP' AND DATE= '20130223' group by (SET)



PART_NUMBER QTY
--------------- ------
DPCDRG100076 38
DPCDRG100083 8
DPCDRG100079 33
DPCDRG100077 2
DPCDRG100082 114
DPCDRG100081 89
DPCDRG100084 34
DPCDRG100085 1
DPCDRG100080 19