$\displaystyle{7}-{30}={7}+{\left(-{30}\right)}\usepackage{cmbright}\Huge\$ . To find the answer, you need to first subtract $\displaystyle{30}-{7}={23}\usepackage{cmbright}\Huge\$ . Since $\displaystyle{30}>{7}\usepackage{cmbright}\Huge\$ , the number with the greater absolute value is negative, so the answer is negative.