1.05% is the change from 861 to 870
Calculation steps:
[( 870 - 861 ) ÷ 861] x 100 = 1.05%
Formula
Percentage change = [(870 - 861) / 861] x 100
Subtract the new number by the original number
870 - 861 = 9
9 ÷ 861 = 0.010452961672473868
0.010452961672473868 x 100 = 1.05%