-97.51% is the change from 321 to 8
Calculation steps:
[( 8 - 321 ) ÷ 321] x 100 = -97.51%
Formula
Percentage change = [(8 - 321) / 321] x 100
Subtract the new number by the original number
8 - 321 = -313
-313 ÷ 321 = -0.9750778816199377
-0.9750778816199377 x 100 = -97.51%