A library is moving 30% of 240 reference books to a new room. How many books will be moved?
Explication
Writing 30% as 0.30 gives 0.30 x 240 = 72 books. Dividing 240 by 3 gives 80, but 30% is three tenths, not one third.
Writing 30% as 0.30 gives 0.30 x 240 = 72 books. Dividing 240 by 3 gives 80, but 30% is three tenths, not one third.