Convert to % for a count SQL

SELECT DEL_CD ,COUNT(DEL_CD) AS COUNT_NO
FROM [DATAStaging].[dbo].[DATASTORE]
GROUP BY DEL_CD

gives me this result

DEL_CD     COUNT_NO
0   开发者_StackOverflow        6442
1           12161
2           2342

But what do I have to do to the script to display the count number as a %

Total rows does = sum of count_no.

Thanks in advance

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SELECT   del_cd, COUNT(DEL_CD) * 100.0 / SUM(COUNT(DEL_CD)) OVER ()
FROM     datastore
GROUP BY
         del_cd