Let the total number of students be \(8u\) (piano \(5u\), violin \(3u\)).

• Piano beginners = \(\frac{2}{2+3} \times 5u = \frac{2}{5} \times 5u = 2u\).
• Violin beginners = \(\frac{5}{5+1} \times 3u = \frac{5}{6} \times 3u = 2.5u\).
• Total beginners = \(2u + 2.5u = 4.5u\).
• Percentage beginners = \(\frac{4.5u}{8u} \times 100\% = 56.25\%\).

Final Answer: 56.25%