0.49% is the change from 618 to 621
Calculation steps:
[( 621 - 618 ) ÷ 618] x 100 = 0.49%
Formula
Percentage change = [(621 - 618) / 618] x 100
Subtract the new number by the original number
621 - 618 = 3
3 ÷ 618 = 0.0048543689320388345
0.0048543689320388345 x 100 = 0.49%