Percentage of questions/answer among the users with the most questions

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Programming Language Design and Implementation

Q&A for designers and implementers of computer programming languages

; with qacounts_cte AS
(SELECT
  OwnerUserId AS uid,
  OwnerDisplayName AS udn,
  COUNT(Id) AS Pcount,
  SUM(case when PostTypeId = 1 then 1 else 0 end) AS QCount,
  SUM(case when PostTypeId = 2 then 1 else 0 end) AS ACount
  FROM Posts
  GROUP BY OwnerUserId, OwnerDisplayName
)

SELECT TOP(##num?500##)
uid AS [User Link],
udn AS [Display Name],
ROUND(QCount*100.0/PCount,2) AS percQ,
ROUND(ACount*100.0/PCount,2) AS percA,
ACount, QCount, PCount
FROM qacounts_cte
ORDER BY QCount DESC

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