Hello! For this question I'll be mostly doing the math needed for the problem and add some notes to let you know what's going on!
850-739=111
111/850
(For this part of the math, the biggest number goes first in the equation, but the original number is the denominator)
111/850=0.13...
(You would now move the decimal to the right two times to get the percent change)
0.13 ---> 01.3 ---> 13 ---> 13%
So the number of students from the past 15 years has decreased 13%
I hope this helps!!!
