The digits in the ones and tenths place are the same. Comparing the hundredths place, $\displaystyle{9}>{7}\usepackage{cmbright}\Huge\$ , so $\displaystyle{7.491}>{7.479}\usepackage{cmbright}\Huge\$ . The correct answer is $\displaystyle{8.81}>{8.8}\usepackage{cmbright}\Huge\$ .