-74.61% is the change from 823 to 209
Calculation steps:
[( 209 - 823 ) ÷ 823] x 100 = -74.61%
Formula
Percentage change = [(209 - 823) / 823] x 100
Subtract the new number by the original number
209 - 823 = -614
-614 ÷ 823 = -0.7460510328068044
-0.7460510328068044 x 100 = -74.61%