-1.15% is the change from 873 to 863
Calculation steps:
[( 863 - 873 ) ÷ 873] x 100 = -1.15%
Formula
Percentage change = [(863 - 873) / 873] x 100
Subtract the new number by the original number
863 - 873 = -10
-10 ÷ 873 = -0.011454753722794959
-0.011454753722794959 x 100 = -1.15%