2.22% is the change from 812 to 830
Calculation steps:
[( 830 - 812 ) ÷ 812] x 100 = 2.22%
Formula
Percentage change = [(830 - 812) / 812] x 100
Subtract the new number by the original number
830 - 812 = 18
18 ÷ 812 = 0.022167487684729065
0.022167487684729065 x 100 = 2.22%