Question

Luann has a piece of ribbon that is 1 yard long. She cuts 33 inches off to tie a gift box. How many inches of ribbon are not used?

Answer 1

First, we convert the given initial length of the ribbon by the conversion factors,
1 yd = 3 ft
1 ft = 12 inches
Converting,
(1 yd)(3 ft/ 1 yd)(12 in/1 ft) = 36 in
Since Luann used 33 inches, the length of the unused ribbon is 3 inches.