A european car manufacturer reports that the fuel efficiency of the new microcar is 28.5 km/l highway and 22.0 km/l city. what are the equivalent fuel efficiency rates in miles per gal?]

We know that:

1 mile = 1.61 km

1 gal = 3.8 L

Therefore converting the fuel efficiency rates:

highway = (28.5 km/L) * (1 mile / 1.61 km) * (3.8 L / 1 gal) = 67.27 mile / gal

city = (22.0 km/L) * (1 mile / 1.61 km) * (3.8 L / 1 gal) = 51.93 mile / gal