The whole class is 1 whole, which is \( \frac{3}{3} \).<br><br>
&bull; Girls = \( \frac{2}{3} \)<br>
&bull; Boys = \( \frac{3}{3} - \frac{2}{3} = \frac{1}{3} \)<br><br>
Final Answer: \( \frac{1}{3} \)