the answer can be explained by dividing the distance covered by thebiker to the number of laps covered by the same. This gives us the ratio of distance per unti lap for the biker.
You have to find the difference between 4 1/2 and 1 7/8, in other words subtract those. MAKE SURE YOU SUBTRACT 4 1/2 MINUS 1 7/8, IF YOU DO IT THE OTHER WAY AROUND, IT WILL IMPACT YOUR ANSWER.
In order to subtract correctly, you have to make them common denominators.
CORRECT ANSWER- B= 2 5/8