A skirt requires 2¼ yards of material. How many can be out from 45 yards?
To find out how many skirts can be made from 45 yards of material, divide the total amount of material by the amount needed for each skirt.
45 yards / 2.25 yards/skirt = <<45/2.25=20>>20 skirts.
Therefore, 20 skirts can be made from 45 yards of material.