Last year the enrollment at Genoa Middle School was 465 students. This year the enrollment is 525. What was the percent increase? Round to one decimal place

21

jk it's 20

step-by-step explanation:

never fear papaguy is here

answer

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.