-83.23% is the change from 811 to 136
Calculation steps:
[( 136 - 811 ) ÷ 811] x 100 = -83.23%
Formula
Percentage change = [(136 - 811) / 811] x 100
Subtract the new number by the original number
136 - 811 = -675
-675 ÷ 811 = -0.8323057953144266
-0.8323057953144266 x 100 = -83.23%