-88.79% is the change from 821 to 92
Calculation steps:
[( 92 - 821 ) ÷ 821] x 100 = -88.79%
Formula
Percentage change = [(92 - 821) / 821] x 100
Subtract the new number by the original number
92 - 821 = -729
-729 ÷ 821 = -0.8879415347137637
-0.8879415347137637 x 100 = -88.79%