-3.1% is the change from 838 to 812
Calculation steps:
[( 812 - 838 ) ÷ 838] x 100 = -3.1%
Formula
Percentage change = [(812 - 838) / 838] x 100
Subtract the new number by the original number
812 - 838 = -26
-26 ÷ 838 = -0.031026252983293555
-0.031026252983293555 x 100 = -3.1%