Answer
There was a decrease of about $7\%$.
Work Step by Step
Change in value:
$=\text{new amount} - \text{original amount}
\\= 14-15
\\= -1$
There was a decrease.
Percent Change:
$ =\dfrac{\text{change in value}}{\text{original amount}}
\\=\dfrac{-1}{15}
\\\approx -0.07
\\\approx -7\%$
There was a decrease of around $7\%$.