Answer:
-0.92497431%
Explanation:
percent change = ( (new value - old value) / (old value) )*100%
percent change = ( ( $9.64 - $9.73 ) / $9.63 ) *100%
= ( -$0.09 / $9.63 )*100%
≅ -0.9 % (note: -0.9% means 0.9% decrease)
(9.64-9.73)*100% / 9.73 = -0.92497431%