36.07% is the change from 610 to 830
Calculation steps:
[( 830 - 610 ) ÷ 610] x 100 = 36.07%
Formula
Percentage change = [(830 - 610) / 610] x 100
Subtract the new number by the original number
830 - 610 = 220
220 ÷ 610 = 0.36065573770491804
0.36065573770491804 x 100 = 36.07%