With 'In 1990, 73 percent of all workers in this industry were classified as working in the sewing department; 91 percent were sewing machine operators.', is it rational to deduce '91 percent of workers in the sewing department were sewing machine operators in 1990.'
In 1990, 73 percent of all workers in this industry were classified as working in the sewing department; 91 percent were sewing machine operators.###91 percent of workers in the sewing department were sewing machine operators in 1990.