0.32% is the change from 618 to 620
Calculation steps:
[( 620 - 618 ) ÷ 618] x 100 = 0.32%
Formula
Percentage change = [(620 - 618) / 618] x 100
Subtract the new number by the original number
620 - 618 = 2
2 ÷ 618 = 0.003236245954692557
0.003236245954692557 x 100 = 0.32%