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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.

Respuesta :

Answer:

200

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:

[tex]x=\frac{100\text{ \% }\cdot\text{ 80}}{40\text{ \%}}=200\text{ seventh graders}[/tex]

Then, there are 200 seventh graders in the class.

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