2/7 of students in a school are in 8th grade. How many students are in the school if 40 of them are 8th graders?

140

Step-by-step explanation:

First we would find the unit rate of students per seventh. So we would do 40 divided by 2 which gives us 20. So per 1/7 we have 20 students. Which we can then say 7 x 20 = 140. So in total there are 140 students

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