-21.12% is the change from 857 to 676
Calculation steps:
[( 676 - 857 ) ÷ 857] x 100 = -21.12%
Formula
Percentage change = [(676 - 857) / 857] x 100
Subtract the new number by the original number
676 - 857 = -181
-181 ÷ 857 = -0.21120186697782964
-0.21120186697782964 x 100 = -21.12%