-0.23% is the change from 859 to 857
Calculation steps:
[( 857 - 859 ) ÷ 859] x 100 = -0.23%
Formula
Percentage change = [(857 - 859) / 859] x 100
Subtract the new number by the original number
857 - 859 = -2
-2 ÷ 859 = -0.002328288707799767
-0.002328288707799767 x 100 = -0.23%