Hi!
Imagine a rectangle with a width of 20 inches, and a height of 16. Find the length around the rectangle (the perimeter).
16+20+16+20=72
There are 12 inches in a feet. How many feet are in 72 inches?
72/12=6
Lana needs 6 feet of ribbon. She bought 7 feet.
7-6=1
It is enough ribbon.
1 foot will be leftover.
Hope this helps! :)
-Peredhel