SELECT * , (cnt_404 / cnt_all) AS 404_prc
FROM (
SELECT bk, bet_type,
COUNT( IF( STATUS IN ( 1, 2, 210 ) , 1, NULL ) ) AS cnt_all,
COUNT( IF( STATUS IN ( 404 ) , 1, NULL ) ) AS cnt_404
FROM  `fork_logs`
WHERE DATE( created_at ) >=  '2017-12-10'
GROUP BY bk, bet_type
) AS t
ORDER BY  `404_prc` DESC