-0.81% is the change from 863 to 856
Calculation steps:
[( 856 - 863 ) ÷ 863] x 100 = -0.81%
Formula
Percentage change = [(856 - 863) / 863] x 100
Subtract the new number by the original number
856 - 863 = -7
-7 ÷ 863 = -0.008111239860950173
-0.008111239860950173 x 100 = -0.81%