Question

the table shows the number of students in each grade at prairie middle school. in the 8th grade, \frac{4}{5} of students study chemistry.
how many students in the 8th grade study chemistry?
? students

Explanation:

Step1: Identify the number of 8th - grade students

From the table, the number of 8th - grade students is \(n = 100\).

Step2: Calculate the number of 8th - grade students studying chemistry

We know that the fraction of 8th - grade students studying chemistry is \(\frac{4}{5}\). To find the number of students, we use the formula \(N=\text{Fraction}\times\text{Total number of 8th - grade students}\).
So \(N=\frac{4}{5}\times100\).
Since \(\frac{4}{5}\times100=\frac{4\times100}{5}\), and \(4\times100 = 400\), then \(\frac{400}{5}=80\).

Answer:

80