As per the problem,
Phil served 1/2 of the blueberry pie.
Phil served 1/4 of the apple pie.
Each pie pan was the same size.
Also each pie had 8 pieces to start.
So pieces of the apple pie served=
So fraction of the apple pie served=
A total of 2 pieces of apple pie were served out of 8 pieces.
Number of pieces of Blueberry pie served=
Hence a total of 4 pieces of blueberry pie were served out of 8 pieces.
Hence number of pieces of blueberry pie served was 2 more than the number of pieces of apple pie served.