The given histogram shows the frequency distribution of the speed of cars passing though at a particular spot on a highway. Study the graph and answer the question that follows. The number of cars with speed between 70 km/h and 80 km/h is what percentage more than the number of the cars with speed between 50 km/h and 60 km/h? (correct to one decimal place)

• A. 29.7%
• B. 15.5%
• C. 22.2%
• D. 28.6%