Destiny has 6 library books on her desk. one third of them are about animals. how many of destiny’s library books are about animals? draw a diagram to show your work.

| shade  |               |               |       Each rectangle stands for one third so shade 
|  this     |               |               |         only one rectangle.
|    one   |               |               |         And one rectangle has two books in it (you
|             |               |               |         divide 6 by 3 to get 2). 
|             |               |               |
|             |               |               |
|             |               |               |

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm