-22.64% is the change from 857 to 663
Calculation steps:
[( 663 - 857 ) ÷ 857] x 100 = -22.64%
Formula
Percentage change = [(663 - 857) / 857] x 100
Subtract the new number by the original number
663 - 857 = -194
-194 ÷ 857 = -0.22637106184364061
-0.22637106184364061 x 100 = -22.64%