3.1% is the change from 838 to 864
Calculation steps:
[( 864 - 838 ) ÷ 838] x 100 = 3.1%
Formula
Percentage change = [(864 - 838) / 838] x 100
Subtract the new number by the original number
864 - 838 = 26
26 ÷ 838 = 0.031026252983293555
0.031026252983293555 x 100 = 3.1%