-1.34% is the change from 823 to 812
Calculation steps:
[( 812 - 823 ) ÷ 823] x 100 = -1.34%
Formula
Percentage change = [(812 - 823) / 823] x 100
Subtract the new number by the original number
812 - 823 = -11
-11 ÷ 823 = -0.013365735115431349
-0.013365735115431349 x 100 = -1.34%