3.25% is the change from 831 to 858
Calculation steps:
[( 858 - 831 ) ÷ 831] x 100 = 3.25%
Formula
Percentage change = [(858 - 831) / 831] x 100
Subtract the new number by the original number
858 - 831 = 27
27 ÷ 831 = 0.032490974729241874
0.032490974729241874 x 100 = 3.25%