Given:
Blue Ace Autos Inc: cost of goods sold / revenue = 63.4%
Ferdova Autos Inc.: cost of goods sold / revenue = 54.2%
The percentage rate represents the part of the revenue that the cost of goods sold is a part of. This means that the revenue is 100%. The difference of the revenue and cost of good sold is the profit. The higher the percentage of the profit, the better.
Blue Ace Autos Inc: 100% - 63.4% = 36.6%
Ferdova Autos Inc: 100% - 54.2% = 45.8%
Ferdova Autos Inc. earn a higher profit (45.8% of revenue) than Blue Ace Autos Inc (36.6% of revenue).