Remember that $\displaystyle{29.6}={29.60}\usepackage{cmbright}\Huge\$ . Now compare the digits of $\displaystyle{29.60}\usepackage{cmbright}\Huge\$ and $\displaystyle{29.55}\usepackage{cmbright}\Huge\$ . The digits in the tens and ones places are the same. Comparing the tenths place, $\displaystyle{5}<{6}\usepackage{cmbright}\Huge\$ , so $\displaystyle{29.55}<{29.6}\usepackage{cmbright}\Huge\$ .