-5.25% is the change from 857 to 812
Calculation steps:
[( 812 - 857 ) ÷ 857] x 100 = -5.25%
Formula
Percentage change = [(812 - 857) / 857] x 100
Subtract the new number by the original number
812 - 857 = -45
-45 ÷ 857 = -0.052508751458576426
-0.052508751458576426 x 100 = -5.25%