Remember that $\displaystyle{2.4}={2.400}\usepackage{cmbright}\Huge\$ . Now compare the digits of 2.418 and 2.400. The digits in the ones and tenths place are the same. Comparing the digits in the hundredths place, $\displaystyle{1}>{0}\usepackage{cmbright}\Huge\$ . Therefore, $\displaystyle{2.418}>{2.4}\usepackage{cmbright}\Huge\$ .