-98.73% is the change from 628 to 8
Calculation steps:
[( 8 - 628 ) ÷ 628] x 100 = -98.73%
Formula
Percentage change = [(8 - 628) / 628] x 100
Subtract the new number by the original number
8 - 628 = -620
-620 ÷ 628 = -0.9872611464968153
-0.9872611464968153 x 100 = -98.73%