Q&A for professional mathematicians
; with counts_cte AS ( SELECT SUM(upvotes) AS countall, SUM(case when (reputation<=101) then upvotes else 0 end) AS countlow FROM Users ) SELECT countlow AS 'Upvotes from low rep users', countall AS 'Total upvotes', ROUND((CAST(countlow AS decimal))*100.0/(CAST(countall AS decimal)),3) AS percentage FROM counts_cte