-80.39% is the change from 811 to 159
Calculation steps:
[( 159 - 811 ) ÷ 811] x 100 = -80.39%
Formula
Percentage change = [(159 - 811) / 811] x 100
Subtract the new number by the original number
159 - 811 = -652
-652 ÷ 811 = -0.8039457459926017
-0.8039457459926017 x 100 = -80.39%