35.62% is the change from 612 to 830
Calculation steps:
[( 830 - 612 ) ÷ 612] x 100 = 35.62%
Formula
Percentage change = [(830 - 612) / 612] x 100
Subtract the new number by the original number
830 - 612 = 218
218 ÷ 612 = 0.3562091503267974
0.3562091503267974 x 100 = 35.62%