-19.37% is the change from 857 to 691
Calculation steps:
[( 691 - 857 ) ÷ 857] x 100 = -19.37%
Formula
Percentage change = [(691 - 857) / 857] x 100
Subtract the new number by the original number
691 - 857 = -166
-166 ÷ 857 = -0.19369894982497082
-0.19369894982497082 x 100 = -19.37%