-96.47% is the change from 821 to 29
Calculation steps:
[( 29 - 821 ) ÷ 821] x 100 = -96.47%
Formula
Percentage change = [(29 - 821) / 821] x 100
Subtract the new number by the original number
29 - 821 = -792
-792 ÷ 821 = -0.9646772228989038
-0.9646772228989038 x 100 = -96.47%