-80.91% is the change from 812 to 155
Calculation steps:
[( 155 - 812 ) ÷ 812] x 100 = -80.91%
Formula
Percentage change = [(155 - 812) / 812] x 100
Subtract the new number by the original number
155 - 812 = -657
-657 ÷ 812 = -0.8091133004926109
-0.8091133004926109 x 100 = -80.91%