4.39% is the change from 820 to 856
Calculation steps:
[( 856 - 820 ) ÷ 820] x 100 = 4.39%
Formula
Percentage change = [(856 - 820) / 820] x 100
Subtract the new number by the original number
856 - 820 = 36
36 ÷ 820 = 0.04390243902439024
0.04390243902439024 x 100 = 4.39%