The answer would be 500 because 40 percent + 40 percent = 80 percent and that would be 400 students but there is still 20 percent left and 20 is half of 40 and half of 200 is 100 so 400+100=500
500 students. if 200 students= 40% and you need to find the full 100% they you would add another 200 students or 40% and then you would add another 100 students or 20%. when you add all them up you get 40%+40%+20%= 100% and 200+200+100=500.