Johann is filling bags of feed for his horses to eat during the winter. He is able to fill a 15-pound bag of horse feed in 9 minutes. He is also filling smaller 8-pound bags with horse feed at the sam

Johann is filling bags of feed for his horses to eat during the winter. He is able to fill a 15-pound bag of horse feed in 9 minutes. He is also filling smaller 8-pound bags with horse feed at the same rate. At this rate, how long does it take Johann to fill an 8-pound bag with horse feed?