You want to calculate the ratio of 7 2/3 feet to 5 3/4 feet. The correct answer will not have units of measurement.
Convert 7 2/3 and 5 3/4 to improper fractions: 23/3 and 23/4.
What is the quotient of 23/3 to 23/4? It's the same as 1/3 to 1/4: (1/3)(4/1) = 4/3.