-96.48% is the change from 823 to 29
Calculation steps:
[( 29 - 823 ) ÷ 823] x 100 = -96.48%
Formula
Percentage change = [(29 - 823) / 823] x 100
Subtract the new number by the original number
29 - 823 = -794
-794 ÷ 823 = -0.9647630619684082
-0.9647630619684082 x 100 = -96.48%