-80.17% is the change from 812 to 161
Calculation steps:
[( 161 - 812 ) ÷ 812] x 100 = -80.17%
Formula
Percentage change = [(161 - 812) / 812] x 100
Subtract the new number by the original number
161 - 812 = -651
-651 ÷ 812 = -0.8017241379310345
-0.8017241379310345 x 100 = -80.17%