For this case we have the following conversion:
[tex] 1 km = 1000m
[/tex]
Therefore, for 20 kilometers we have:
[tex] (20) (1000) = 20000 m
[/tex]
Then, we have the following relationship:
[tex] 800 + x = 20000
[/tex]
Where,
x: distance Bob travels by bicycle
Clearing x we have:
[tex] x = 20000 - 800
x = 19200
[/tex]
Then, the percentage that Bob travels by bicycle is:
[tex] (\frac{19200}{20000}) * (100) = 96 [/tex]%
Answer:
The percentage that Bob travels in bicycle is 96%.
