The proportions are \(\displaystyle \frac12,\frac38,\frac18\), or \(50\%,37.5\%,12.5\%\).

A 100-square waffle needs 50, 37.5 and 12.5 squares, so whole squares alone cannot show these exactly.

Angles are \(\displaystyle \frac12\times360=180\), \(\displaystyle \frac38\times360=135\), and \(\displaystyle \frac18\times360=45\) degrees. All are whole numbers.

Answer

The pie chart works exactly: \(180^\circ,135^\circ,45^\circ\). The 100-square waffle would require half squares for coding and drama.