3.37% is the change from 830 to 858
Calculation steps:
[( 858 - 830 ) ÷ 830] x 100 = 3.37%
Formula
Percentage change = [(858 - 830) / 830] x 100
Subtract the new number by the original number
858 - 830 = 28
28 ÷ 830 = 0.033734939759036145
0.033734939759036145 x 100 = 3.37%