Answer
$A^{-1}=\left[\begin{array}{rrr}
{0.01}&{0.05}&{-0.01}\\
{0.01}&{-0.02}&{0.01}\\
{-0.02}&{0.01}&{0.03}\end{array}\right]$
Work Step by Step
Using desmos.com/matrix
select "New matrix", define the dimensions, and enter the matrix entries...
(see screenshot)
Rounding to two decimal places,
$A^{-1}=\left[\begin{array}{rrr}
{0.01}&{0.05}&{-0.01}\\
{0.01}&{-0.02}&{0.01}\\
{-0.02}&{0.01}&{0.03}\end{array}\right]$