-80.29% is the change from 817 to 161
Calculation steps:
[( 161 - 817 ) ÷ 817] x 100 = -80.29%
Formula
Percentage change = [(161 - 817) / 817] x 100
Subtract the new number by the original number
161 - 817 = -656
-656 ÷ 817 = -0.802937576499388
-0.802937576499388 x 100 = -80.29%