-82.86% is the change from 811 to 139
Calculation steps:
[( 139 - 811 ) ÷ 811] x 100 = -82.86%
Formula
Percentage change = [(139 - 811) / 811] x 100
Subtract the new number by the original number
139 - 811 = -672
-672 ÷ 811 = -0.8286066584463625
-0.8286066584463625 x 100 = -82.86%