Final answer:
To determine the percentage of second graders, we divide the number of second graders (7) by the total number of students (18) and multiply by 100, resulting in approximately 38.89%.
Step-by-step explanation:
To find out what percentage of the class are second graders, we first need to calculate the total number of students in the class by adding together the number of first graders, second graders, and third graders. We have 6 first graders, 7 second graders, and 5 third graders, which give us a total of 18 students.
The formula to calculate the percentage is:To find the percentage of second graders in the class, divide the number of second graders by the total number of students in the class and multiply by 100. In this case, there are 7 second graders, 6 first graders, and 5 third graders, making a total of 18 students. So, the percentage of second graders is (7 / 18) * 100 = 38.89%.
Percentage of second graders = (Number of second graders / Total number of students) × 100
Substituting the given numbers into the formula, we get:
Percentage of second graders = (7 / 18) × 100 ≈ 38.89%
Therefore, approximately 38.89 percent of the students in the class are second graders.