If you're just comparing percentages, then yes 0.9 > 0.5. However, overall the comparison doesn't stand up. 1 gallon for 50 miles vs 2.94 gallons, the 50 mpg i

If you're just comparing percentages, then yes 0.9 > 0.5. However, overall the comparison doesn't stand up. 1 gallon for 50 miles vs 2.94 gallons, the 50 mpg is what is saving more gas, therefore it wins.