Check your basics of complex numbers

Algebra Level 2

$\Large\dfrac{\color{#3D99F6}{1}\color{#D61F06}{-}\color{#20A900}{i}}{\color{#3D99F6}{1}\color{magenta}{+}\color{#20A900} {i}}\color{#624F41}{=} \ \color{#EC7300}{?}$

Note: $i=\sqrt{-1}$