What is the vomume of a shipping cube with dimensions of 2 and 1/2 feet

6 3/4

15 5/8

or

8 1/8

Volume = length x width x height but there are only 2 demiintions

2 x 2 1/2=

first, make 2 1/2 into an improper fraction

2 x 2=4+1=5

5/2 is the improper fraction

now, write 2 as a fraction, 2/1

now, 5/2 x 2/1=5 or 5/1

This is the answer, I don't know it is wrong