Answer:
The answer is 45.9%
Step-by-step explanation:
In order to determine the percent of survey participants who chose the zoo, we need to determine how many participants completed the survey.
We know that:
28 students chose the zoo
33 students chose the amusement park
9 students did not complete the survey
So, the total amount of participants who completed the survey is:
28+33=61
Then, we have to determine the rate of participants who chose the zoo:

Finally, the answer is 45.9%