-19.52% is the change from 840 to 676
Calculation steps:
[( 676 - 840 ) ÷ 840] x 100 = -19.52%
Formula
Percentage change = [(676 - 840) / 840] x 100
Subtract the new number by the original number
676 - 840 = -164
-164 ÷ 840 = -0.19523809523809524
-0.19523809523809524 x 100 = -19.52%