What percentage of the estate of a late childless wife can the Muslim husband inherit?

In Islamic inheritance law, a husband can inherit from his late wife's estate only if she has no living children, parents, or siblings. In this case, the husband can inherit 1/2 of his late wife's estate. However, if the wife has any living heirs from the aforementioned categories, the husband's share is reduced to 1/4. Therefore, the correct answer is 1/2, which is the percentage of the estate that the Muslim husband can inherit if his late wife has no living heirs except for him.