You may have used $\displaystyle\frac{{19}}{{1}}\usepackage{cmbright}\Huge\$ instead of $\displaystyle\frac{{19}}{{4}}\usepackage{cmbright}\Huge\$ , which is the correct improper fraction to use for $\displaystyle{4}\frac{{3}}{{4}}\usepackage{cmbright}\Huge\$ .