Respuesta :

each student of the four decorated 1/20.

If you divide 1/5 by 4, you can also write this as 1/5 * 1/4. By multiplying the bases, you get 1/20.

You can check this by multiplying 1/20 by 4. 1/20 * 4/1 = 1/5 which is the section of the bulletin board.