In this task, you are given a list. This list contains many lists of integers. The list is several items written within a []. Your task is to find the maximum number among the members of each inner list. The output should be a list comprised of the maximums with the same order as the internal lists.
[[61, 44, 0], [-52, -173, -189, 35, 28, 47, 9], [-81, -172, -154]]