-84.22% is the change from 811 to 128
Calculation steps:
[( 128 - 811 ) ÷ 811] x 100 = -84.22%
Formula
Percentage change = [(128 - 811) / 811] x 100
Subtract the new number by the original number
128 - 811 = -683
-683 ÷ 811 = -0.842170160295931
-0.842170160295931 x 100 = -84.22%