Write SQL query to solve given problem: What percentage of customers engaged in the household segment are from Iran?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT CAST(SUM(IIF(T2.n_name = 'IRAN', 1, 0)) AS REAL) * 100 / COUNT(T2.n_name) FROM customer AS T1 INNER JOIN nation AS T2 ON T1.c_nationkey = T2.n_nationkey WHERE T1.c_mktsegment = 'HOUSEHOLD'