-93.8% is the change from 129 to 8
Calculation steps:
[( 8 - 129 ) ÷ 129] x 100 = -93.8%
Formula
Percentage change = [(8 - 129) / 129] x 100
Subtract the new number by the original number
8 - 129 = -121
-121 ÷ 129 = -0.937984496124031
-0.937984496124031 x 100 = -93.8%