if it help you can try to think about this problem with smaller numbers and try to come up with a way of solving it.
for example if they had 2 pages printed on each piece of news print and they had 4 pages.
news print 1 page 1 page 2
news print 2 page 3 page 4
that would make 2 pieces of newsprint.
So that was really dividing the 2 stories on each news print by the 4 pages in total. 4/2=2.
So in your example
In a typical newspaper, 4 pages are printed on one piece of newsprint. If the last page of a section of a newspaper is page 24, how many pieces of newsprint are in that section of the newspaper?
24/4