-1.27% is the change from 868 to 857
Calculation steps:
[( 857 - 868 ) ÷ 868] x 100 = -1.27%
Formula
Percentage change = [(857 - 868) / 868] x 100
Subtract the new number by the original number
857 - 868 = -11
-11 ÷ 868 = -0.012672811059907835
-0.012672811059907835 x 100 = -1.27%