2.91% is the change from 618 to 636
Calculation steps:
[( 636 - 618 ) ÷ 618] x 100 = 2.91%
Formula
Percentage change = [(636 - 618) / 618] x 100
Subtract the new number by the original number
636 - 618 = 18
18 ÷ 618 = 0.02912621359223301
0.02912621359223301 x 100 = 2.91%