-84.11% is the change from 812 to 129
Calculation steps:
[( 129 - 812 ) ÷ 812] x 100 = -84.11%
Formula
Percentage change = [(129 - 812) / 812] x 100
Subtract the new number by the original number
129 - 812 = -683
-683 ÷ 812 = -0.8411330049261084
-0.8411330049261084 x 100 = -84.11%