Question

At Orangefield Junior High 40% ofthe seventh graders participate in extra-curricular activities a such as athletics, band, and drama. If there are 80 seventh graders participating in extra-curricular activities how many seventh graders are in the class.

Answer 1

200

Step-by-step explanation:

To know the total number of graders, we will use the rule of three. Where we know that 40% is equivalent to 80 graders and we want to know how many graders are equivalent to 100%. Then:

40% -------- 80 seventh graders

100% -------- x

Where x is the number of seventh graders in the class.

So, solving for x, we get:

`x=\frac{100\text{ \% }\cdot\text{ 80}}{40\text{ \%}}=200\text{ seventh graders}`

Then, there are 200 seventh graders in the class.