-1.26% is the change from 870 to 859
Calculation steps:
[( 859 - 870 ) ÷ 870] x 100 = -1.26%
Formula
Percentage change = [(859 - 870) / 870] x 100
Subtract the new number by the original number
859 - 870 = -11
-11 ÷ 870 = -0.01264367816091954
-0.01264367816091954 x 100 = -1.26%