-0.12% is the change from 824 to 823
Calculation steps:
[( 823 - 824 ) ÷ 824] x 100 = -0.12%
Formula
Percentage change = [(823 - 824) / 824] x 100
Subtract the new number by the original number
823 - 824 = -1
-1 ÷ 824 = -0.0012135922330097086
-0.0012135922330097086 x 100 = -0.12%