-80.19% is the change from 823 to 163
Calculation steps:
[( 163 - 823 ) ÷ 823] x 100 = -80.19%
Formula
Percentage change = [(163 - 823) / 823] x 100
Subtract the new number by the original number
163 - 823 = -660
-660 ÷ 823 = -0.8019441069258809
-0.8019441069258809 x 100 = -80.19%