WITH t AS (
SELECT
  PF_CODE
  , CAST(SUM(CASE WHEN CATEGORY_CODE = '120' THEN AMT ELSE 0 END) AS FLOAT) / SUM(AMT) AS a
FROM DRINK_HABITS
WHERE GENDER_CODE = '2' OR GENDER_CODE = '3'
GROUP BY PF_CODE
)
SELECT
  t.PF_CODE AS CODE,
  p.PF_NAME AS NAME,
  ROUND(100 * t.a, 1) AS PERCENTAGE
FROM
  t
LEFT JOIN
  PREFECTURE AS p
  ON t.PF_CODE = p.PF_CODE
ORDER BY
  PERCENTAGE DESC, CODE