2.09% is the change from 861 to 879
Calculation steps:
[( 879 - 861 ) ÷ 861] x 100 = 2.09%
Formula
Percentage change = [(879 - 861) / 861] x 100
Subtract the new number by the original number
879 - 861 = 18
18 ÷ 861 = 0.020905923344947737
0.020905923344947737 x 100 = 2.09%