Correct. -100, $\displaystyle-\frac{{1}}{{9}}\usepackage{cmbright}\Huge\$ , 0, $\displaystyle\frac{{8}}{{5}}\usepackage{cmbright}\Huge\$ , and 50 can all be represented as $\displaystyle\frac{{p}}{{q}}\usepackage{cmbright}\Huge\$ , where both p and q are integers, so they are all rational numbers.