6.31% is the change from 618 to 657
Calculation steps:
[( 657 - 618 ) ÷ 618] x 100 = 6.31%
Formula
Percentage change = [(657 - 618) / 618] x 100
Subtract the new number by the original number
657 - 618 = 39
39 ÷ 618 = 0.06310679611650485
0.06310679611650485 x 100 = 6.31%