34.3% is the change from 618 to 830
Calculation steps:
[( 830 - 618 ) ÷ 618] x 100 = 34.3%
Formula
Percentage change = [(830 - 618) / 618] x 100
Subtract the new number by the original number
830 - 618 = 212
212 ÷ 618 = 0.343042071197411
0.343042071197411 x 100 = 34.3%