Let the total number of staff be \(8u\) (permanent \(5u\), contract \(3u\)).<br><br>
&bull; Permanent WFH = \(\frac{2}{2+3} \times 5u = \frac{2}{5} \times 5u = 2u\).<br>
&bull; Contract WFH = \(\frac{4}{4+1} \times 3u = \frac{4}{5} \times 3u = 2.4u\).<br>
&bull; Total WFH = \(2u + 2.4u = 4.4u\).<br>
&bull; Percentage = \(\frac{4.4u}{8u} \times 100\% = 55\%\).<br><br>
Final Answer: 55%