[tex]\begin{gathered} \text{ we have to order } \\ -2,\frac{2}{7},-\frac{10}{3} \\ \\ -\frac{10}{3}\approx-3.333333<-2 \\ \\ \text{ thus } \\ \\ -\frac{10}{3}<-2<\frac{2}{7} \\ \\ \text{ the order is then} \\ \\ -\frac{10}{3},-2,\frac{2}{7} \end{gathered}[/tex]
