You may have chosen this option because it is in the form of a complex number using the 1 and the 2, but it is not equal to $\displaystyle\frac{{1}}{{2}}\usepackage{cmbright}\Huge\$ . A complex number is any number in the form $\displaystyle{a}+{b}{i}\usepackage{cmbright}\Huge\$ where a and b are real numbers. The fraction $\displaystyle\frac{{1}}{{2}}\usepackage{cmbright}\Huge\$ is the real part of this complex number.