150 students at York Middle School took part in the school clean up. This is 30% of
the school's total students. How many students go to York Middle School?

500 students.

Step-by-step explanation:

Since 150 students make up 30% of the school's student population, the equation 150/30=x/100. In order to find x, cross multiply x*30 and 150*100. Then set the two results equal to each other and solve. 15000=30x.  15000/30=500. x=500.

500 students go to the middle school.

Step-by-step explanation:

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.