calc worker time for queries

gistfile1.sql

select
    qs.creation_time,
    qs.last_execution_time
    ,qs.execution_count
    ,(CAST(qs.execution_count as decimal(18,4)) / (SUM(qs.execution_count) OVER (PARTITION BY 1))) AS perc_execution_count
 
    ,qs.total_worker_time -- microseconds
    ,CAST(qs.total_worker_time as decimal(18,4)) / CAST(qs.execution_count AS float) as avg_total_worker_time
    --,SUM(qs.total_worker_time) OVER (PARTITION BY 1) AS total_total_worker_time
    ,(CAST(qs.total_worker_time as decimal(18,4)) / (SUM(qs.total_worker_time) OVER (PARTITION BY 1))) AS perc_total_worker_time
   
    ,qs.total_elapsed_time -- microseconds
    ,CAST(qs.total_elapsed_time as decimal(18,2)) / CAST(qs.execution_count AS float) as avg_total_elapsed_time
    --,SUM(qs.total_elapsed_time) OVER (PARTITION BY 1) AS total_total_elapsed_time
    ,(CAST(qs.total_elapsed_time as decimal(18,4)) / (SUM(qs.total_elapsed_time) OVER (PARTITION BY 1))) AS perc_total_elapsed_time
  
    ,qs.total_rows -- microseconds
    ,CEILING(CAST(qs.total_rows as decimal(18,4)) / qs.execution_count) as avg_total_rows
    --,SUM(qs.total_rows) OVER (PARTITION BY 1) AS total_total_rows
    ,(CAST(qs.total_rows as decimal(18,4)) / (SUM(qs.total_rows) OVER (PARTITION BY 1))) AS perc_total_rows
  
    ,'"'+REPLACE(REPLACE(REPLACE (SUBSTRING(qt.text,qs.statement_start_offset/2 +1, 
                 (CASE WHEN qs.statement_end_offset = -1 
                       THEN LEN(CONVERT(nvarchar(max), qt.text)) * 2 
                       ELSE qs.statement_end_offset end -
                            qs.statement_start_offset
                 )/2
             ),'"','''' ), char(13), ''), char(10), ' ')+'"'AS query_text
from sys.dm_exec_query_stats qs
    CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) as qt