Какое неравенство неверно?

• \(15\frac{5}{12}\lt 15\frac{5}{6}\)
• \(21\frac{2}{5}\gt 21\frac{5}{6}\)
• \(2\frac{7}{15}\gt 1\frac{5}{7}\)
• \(\frac{8}{15}\lt 1\frac{5}{25}\)