-80.89% is the change from 811 to 155
Calculation steps:
[( 155 - 811 ) ÷ 811] x 100 = -80.89%
Formula
Percentage change = [(155 - 811) / 811] x 100
Subtract the new number by the original number
155 - 811 = -656
-656 ÷ 811 = -0.8088779284833539
-0.8088779284833539 x 100 = -80.89%