Answer
338.6, $\frac{20.9 miles}{1 gallon}$
Work Step by Step
Start Reading =28, 058.1
End Reading = 28, 396.7
Miles Travelled = End Reading – Start Reading = 28, 396.7 - 28, 058.1
= 338.6
338.6 miles 16.2 gallons
$\frac{338.6 miles}{16.2 gallons}$= $\frac{20.90 miles}{1 gallon}$ =$\frac{20.9 miles}{1 gallon}$