-98.56% is the change from 624 to 9
Calculation steps:
[( 9 - 624 ) ÷ 624] x 100 = -98.56%
Formula
Percentage change = [(9 - 624) / 624] x 100
Subtract the new number by the original number
9 - 624 = -615
-615 ÷ 624 = -0.9855769230769231
-0.9855769230769231 x 100 = -98.56%