Winter ate one slice of pie. Fall ate two slices. If there were initially 12 slices and all the slices are the same size, what fraction of the pie is remaining?

9/12, or 3/4 if you simply the answer

Hi there,

let a be the remaining slices

so that a+1+2=12

1: slice eaten by Winter

2: slice eaten by Fall

both ate 3 slices

and we have a total of 12 slices

so the result should be 12-3=9 slices remaining

with algebra with have a+3=12

subtract 3 from both sides

a+3-3=12-3

a=9

Hence 9 slices left