Database: thrombosis_prediction
Question: What percentage of patients with a proteinuria level within the normal range have a uric acid level below the normal range?
SQL: SELECT CAST(SUM(CASE WHEN UA <= 6.5 THEN 1 ELSE 0 END) AS REAL) * 100 / COUNT(ID) FROM Laboratory WHERE `U-PRO` > 0 AND `U-PRO` < 30