3.13% is the change from 831 to 857
Calculation steps:
[( 857 - 831 ) ÷ 831] x 100 = 3.13%
Formula
Percentage change = [(857 - 831) / 831] x 100
Subtract the new number by the original number
857 - 831 = 26
26 ÷ 831 = 0.031287605294825514
0.031287605294825514 x 100 = 3.13%