trying to get MPG to output as float

[tetoronga]

starting = raw_input ("Please enter the starting l/100km:")
ending = raw_input ("Please enter the ending l/100km:")
starting = int (starting)
ending  = int (ending)
#Processing
print (" l per 100km    MPG")
print ("-------------------------------")

for l_per_100km in range (starting,ending+1):
    mpg = 287.5 / l_per_100km
    mpg = float (mpg)
    print "%5i" % l_per_100km, "%12i" % mpg