2/9 shirts divided by 3 3/5 minutes
change 3 3/5 to an improper fraction
3 3/5 = (5*3 +3)/5 = 18/5
2/9 divided by 18/5
copy dot flip
2/9 * 5/18 = 10/162
divide top and bottom by 2
5/81
5/81 shirts per minute
