Energy required to remove an electron from He⁺ ion is $\Delta E_1 = 54.4eV$

Energy required to remove an electron from He⁺ ion is $\Delta E_2 = \frac{54.4 eV}{2.2} = 24.6eV$

$\Delta E = \Delta E_1 + \Delta E_2 = 54.4 eV + 24.6 eV = 79 eV$