Northside Christian Academy has 528 students enrolled this year. That is an in- crease of 10% over last year's enrollment. How many students were enrolled last year?
Let
x ------> students enrolled last year
we have that
100%+10%=110%=110/100=1.10
so
528=1.10x
solve for x
x=528/1.10
x=480
answer is 480 students