Answer:
$ wasted: 3.33, Each Ornament Cost: $0.33
Explanation:
45 ornaments cost $15
Divide both by three
3 ornaments cost $1
If 10 ornaments are wasted, then multiply 1 by 10/3, which equals 3.33.
Since 3 ornaments cost $1, divide 1 by 3 to get 0.33