Given that jill bought a bag of cat food for her cats which weighs 9 pounds and used 4/5 of the bag, we will compute how many pounds is 4/5 of the bag in order to know how many pounds she has used. So let us divide 9 pounds by 5 and we get. So per pound is 1.8 of the bag. Therefore, she has used 7.2 pounds out of 9 pounds. Hope this answer helps.
