Final answer:
To find the total number of 7th graders in a class when 25% say they are online and 22 students represent this percentage, calculate 25/100 = 22/T; by cross-multiplication, T = (22 * 100) / 25, which equals 88. So, there are 88 students in the 7th grade class.
Step-by-step explanation:
If 25% of the 7th grade class say they are online and 22 students represent this percentage, we need to find out the total number of 7th graders in the class. To calculate this, we can set up a simple proportion where 25% corresponds to 22 students.
The proportion can be expressed as follows:
- 25% is to 22 students as 100% is to the total number of students in the class (which we will call T).
To solve for T, we use the equation:
25/100 = 22/T
By cross-multiplication, we get:
25 * T = 22 * 100
T = (22 * 100) / 25
T = 2200 / 25
T = 88
Therefore, there are 88 students in the 7th grade class.