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=
![(1)/(4)*8=2](https://img.qammunity.org/2019/formulas/mathematics/high-school/9s49fiwwbpqys2y4nnm7iu1mcrhtquowgm.png)
So fraction of the apple pie served=
![(2)/(8)](https://img.qammunity.org/2019/formulas/mathematics/college/56pw83qmxcupbl1e5cmp4bwec5ew2frrf2.png)
A total of 2 pieces of apple pie were served out of 8 pieces.
Number of pieces of Blueberry pie served=
![(1)/(2)*8=4\\](https://img.qammunity.org/2019/formulas/mathematics/high-school/xa6ew9ng9x8vc529hgvme4v35rzq45t8c0.png)
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.