Answer: 8.6%
step by step:
1) you would add the number of people that did not finish the race which are the one's who were disqualified and those who gave up.
14+4=18
2) you would take the number that you just added and divide it for the total number of people.
18÷210
3) then you would multiple the value that you just got from the above one and multiple it by 100
18/210 ×100
= 8.6%
hope this helps