The number $\displaystyle-\frac{{15}}{{7}}=-{2}\frac{{1}}{{7}}\usepackage{cmbright}\Huge\$ . This number falls between $\displaystyle-{3}\usepackage{cmbright}\Huge\$ and $\displaystyle-{2}\usepackage{cmbright}\Huge\$ . The point shown is to the left of $\displaystyle-{4}\usepackage{cmbright}\Huge\$ , so it is between $\displaystyle-{5}\usepackage{cmbright}\Huge\$ and $\displaystyle-{4}\usepackage{cmbright}\Huge\$ .