The inverse of $ z $ is:
$$ z^{-1} = \frac{ 4330 }{ 45453473 }+\frac{ 67280 }{ 45453473 }i $$We will denote the inverse of $ z $ as $ z_1 $. The inverse can be found in three steps.
Step 1: Rewrite complex number as its reciprocal
$$ z_1 = \frac{1}{ \frac{ 433 }{ 10 }-\frac{ 3364 }{ 5 }i } $$Step 2: Multiply top and bottom by complex conjugate of $ z $
$$ z_1 = \frac{1}{ \frac{ 433 }{ 10 }-\frac{ 3364 }{ 5 }i } \cdot \frac{ \frac{ 433 }{ 10 }+\frac{ 3364 }{ 5 }i }{ \frac{ 433 }{ 10 }+\frac{ 3364 }{ 5 }i } $$Step 3: Simplify
$$ z_1 = \frac{ \frac{ 433 }{ 10 }+\frac{ 3364 }{ 5 }i }{ \frac{ 45453473 }{ 100 } } $$$$ z_1 = \frac{ \frac{ 433 }{ 10 } }{ \frac{ 45453473 }{ 100 } } + \frac{ \frac{ 3364 }{ 5 } }{ \frac{ 45453473 }{ 100 } } \cdot i$$$$ z_1 = \frac{ 4330 }{ 45453473 }+\frac{ 67280 }{ 45453473 }i $$