-97.64% is the change from 339 to 8
Calculation steps:
[( 8 - 339 ) ÷ 339] x 100 = -97.64%
Formula
Percentage change = [(8 - 339) / 339] x 100
Subtract the new number by the original number
8 - 339 = -331
-331 ÷ 339 = -0.976401179941003
-0.976401179941003 x 100 = -97.64%