Marissa has 4.5 feet of ribbon that she wants to use to tie some boxes. If 1 foot of ribbon is left after Marissa uses 0.7 feet of ribbon to tie each box, find out how many boxes she tied?
Marissa used a total of 4.5 - 1 = <<4.5-1=3.5>>3.5 feet of ribbon to the boxes.
Thus, there were 3.5/0.7 = <<3.5/0.7=5>>5 boxes.
#### 5