Используем правило: \(a\frac{b}{c}=\frac{ac+b}{c}\).
- \(2\frac{8}{9}=\frac{2\cdot9+8}{9}=\frac{26}{9}\);
- \(2\frac{3}{5}=\frac{2\cdot5+3}{5}=\frac{13}{5}\);
- \(2\frac{2}{3}=\frac{2\cdot3+2}{3}=\frac{8}{3}\);
- \(2\frac{4}{15}=\frac{2\cdot15+4}{15}=\frac{34}{15}\);
- \(2\frac{7}{16}=\frac{2\cdot16+7}{16}=\frac{39}{16}\).
Ответ: \(\frac{26}{9};\ \frac{13}{5};\ \frac{8}{3};\ \frac{34}{15};\ \frac{39}{16}\).