Answer: 55%
Explanation:
Step 1
To find the students who participate in at least one activity after school, take the number of students who participate (825) and divide by the total number of students (1500).
825/1500 = 0.55
Step 2
Take the answer from step 1 and multiple it by 100 to find the percentage.
0.55 x 100% = 55%