5.06% is the change from 790 to 830
Calculation steps:
[( 830 - 790 ) ÷ 790] x 100 = 5.06%
Formula
Percentage change = [(830 - 790) / 790] x 100
Subtract the new number by the original number
830 - 790 = 40
40 ÷ 790 = 0.05063291139240506
0.05063291139240506 x 100 = 5.06%