3.35% is the change from 836 to 864
Calculation steps:
[( 864 - 836 ) ÷ 836] x 100 = 3.35%
Formula
Percentage change = [(864 - 836) / 836] x 100
Subtract the new number by the original number
864 - 836 = 28
28 ÷ 836 = 0.03349282296650718
0.03349282296650718 x 100 = 3.35%