Respuesta :

3/12 or 1/4 is left of the bread

2*4
-----= 8/12 - i did this for a common denominator
3*4

 8       1       9
---  +  ---  = --- i did this to find the total eaten
12      12    12

12      9     3                            1
---  _ --- = --- or simplified as ----
12     12   12                           4

the total amount of bread left is 3/12 or 1/4 (simplified)