-1.22% is the change from 822 to 812
Calculation steps:
[( 812 - 822 ) ÷ 822] x 100 = -1.22%
Formula
Percentage change = [(812 - 822) / 822] x 100
Subtract the new number by the original number
812 - 822 = -10
-10 ÷ 822 = -0.012165450121654502
-0.012165450121654502 x 100 = -1.22%