2.33% is the change from 858 to 878
Calculation steps:
[( 878 - 858 ) ÷ 858] x 100 = 2.33%
Formula
Percentage change = [(878 - 858) / 858] x 100
Subtract the new number by the original number
878 - 858 = 20
20 ÷ 858 = 0.023310023310023312
0.023310023310023312 x 100 = 2.33%