SELECT P.PF_CODE AS CODE, P.PF_NAME AS NAME, TMP.PERCENTAGE AS PERCENTAGE
FROM PREFECTURE P
JOIN (
    SELECT
    ROUND(
        CAST(
        SUM(CASE WHEN CATEGORY_CODE = '120' THEN AMT ELSE 0 END) * 100.0
        AS REAL
        )/SUM(CASE WHEN CATEGORY_CODE = '110' THEN AMT ELSE 0 END) ,
     1) AS PERCENTAGE,
    PF_CODE
FROM DRINK_HABITS
WHERE GENDER_CODE IN ('2', '3')
GROUP BY PF_CODE
) AS TMP
ON P.PF_CODE = TMP.PF_CODE
ORDER BY PERCENTAGE DESC, CODE DESC