Write SQL query to solve given problem: Calculate the percentage of Asian students among students of other races who graduated from institution in Alabama in year 2013 within 100 percent of normal / expected time.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT CAST(SUM(CASE WHEN T2.race = 'A' THEN 1 ELSE 0 END) AS REAL) * 100 / SUM(T2.grad_cohort) FROM institution_details AS T1 INNER JOIN institution_grads AS T2 ON T1.unitid = T2.unitid WHERE T2.year = 2013 AND T1.state = 'Alabama'