In a school, some students from section A were shifted to section B of Class X, thereby increasing the number of students in section B by 12%. Later, all of these shifted students were sent back to section A. By what percentage (correct up to two decimal places) did the number of students in section B decrease?

In a town with 30,000 professionals, teachers make up 11% of the total professionals. If 46% of teachers are male, what is the number of female teachers in the town?

In a town's professional breakdown, doctors represent 18% and clerks represent 8% of the total professionals. If the number of doctors is 3000 greater than the number of clerks, what is the total number of professionals in the town?