Answer:
10%
Step-by-step explanation:
Given:
Total number of racers = 270
Number of racers completed the race = 243
Number of racers gave up = 20
Now,
The number of racers who did not complete the race
= Total number of racers - Number of racers completed the race
= 270 - 243
= 27
Therefore,
The percentage of racers who did not complete the race
= [tex]\frac{\textup{number of racers who did not complete}}{\textup{Total number of racers}}\times100\%[/tex]
= [tex]\frac{\textup{27}}{\textup{270}}\times100\%[/tex]
= 10%
