-90.64% is the change from 823 to 77
Calculation steps:
[( 77 - 823 ) ÷ 823] x 100 = -90.64%
Formula
Percentage change = [(77 - 823) / 823] x 100
Subtract the new number by the original number
77 - 823 = -746
-746 ÷ 823 = -0.9064398541919806
-0.9064398541919806 x 100 = -90.64%