4.1% is the change from 830 to 864
Calculation steps:
[( 864 - 830 ) ÷ 830] x 100 = 4.1%
Formula
Percentage change = [(864 - 830) / 830] x 100
Subtract the new number by the original number
864 - 830 = 34
34 ÷ 830 = 0.04096385542168675
0.04096385542168675 x 100 = 4.1%