Question

all students in ridgewood junior high school either get their lunch in the school cafeteria or brought it from home on tuesday. 5% of students brought their lunch. 40 students brought their lunch. how many students in total are in ridgewood junior high school? insert the values given in the problem then scale up or down to find the missing value.

Explanation:

Step1: Define the percentage relationship

Let \( x \) be the total number of students. We know that \( 5\% \) of \( x \) is equal to 40. Mathematically, this is \( 0.05x = 40 \) (since \( 5\% = \frac{5}{100}=0.05 \)).

Step2: Solve for \( x \)

To find \( x \), we divide both sides of the equation \( 0.05x = 40 \) by \( 0.05 \). So, \( x=\frac{40}{0.05} \). Calculating this, \( \frac{40}{0.05}=800 \) (because \( 40\div0.05 = 40\div\frac{1}{20}=40\times20 = 800 \)).

Answer:

The total number of students in Ridgewood Junior High School is 800.