Answer
There was a decrease of about $4\%$.
Work Step by Step
Change in value:
$=\text{new amount} - \text{original amount}
\\= 38.6-40.2
\\= -1.6$
There was a decrease.
Percent Change:
$ =\dfrac{\text{change in value}}{\text{original amount}}
\\=\dfrac{-1.6}{40.2}
\\\approx -0.04
\\\approx -4\%$
There was a decrease of around $4\%$.
