we have
the decimal number is 5.5 inches
Part a
Convert to fraction number
Multiply the decimal number by the fraction 10/10
5.5*(10/10)=55/10
Simplify
Divide by 5 numerator and denominator
55/10=11/2 ----> fraction number
Convert to mixed number
5.5=5+0.5=5+1/2=5 1/2 inches ----> mixed number
Convert to percentage
Multiply by 100 the decimal number
5.5*100=550%
therefore
The answer is
5 1/2 550%
option C