Final answer:
The manufacturing industry decreased the most between 1947 and 1957 due to the shift from an industrial-based economy to a service-based economy.
Step-by-step explanation:
The industry division that decreased the most between 1947 and 1957 was the manufacturing industry.
During this period, the American economy experienced a shift from an industrial-based economy to a service-based economy. The emergence of white-collar jobs in fields such as sales, advertising, insurance, and communications led to a decline in manufacturing jobs.
This shift resulted in the loss of factory jobs, a decline in union membership, and the rise of part-time and contract laborers in the service sector.