Answer
$\approx 33\%$ decrease
Work Step by Step
Change in value:
$=\text{new amount} - \text{original amount}
\\= 6-9
\\= -3$
There was a decrease.
Percent Change:
$ =\dfrac{\text{change in value}}{\text{original amount}}
\\=\dfrac{-3}{9}
\\\approx -0.33
\\\approx -33\%$
There was a decrease of around $33\%$.