unit rates- need help

What is 17/2 lb and 3/4 gal as a unit rate?

$\frac{\frac{17}{2}lb}{\frac{3}{4}gal}=11{\frac{1}{3}}\frac{lb}{gal}$ 

$\large11{\frac{1}{3}}\frac{lb}{gal}$$\times$$\LARGE\frac{\frac{1kg}{m^3}}{\LARGE\frac{0.010022413122466\ lb}{gal}}$ 

$11{\frac{1}{3}}\frac{lb}{gal}$ $=1130.79885999\ \frac{kg}{m^3}$

$Density \ of \ air \ at \ 1013 \ hPa \ and \approx 100grd \ Celsius.$

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