-3.74% is the change from 642 to 618
Calculation steps:
[( 618 - 642 ) ÷ 642] x 100 = -3.74%
Formula
Percentage change = [(618 - 642) / 642] x 100
Subtract the new number by the original number
618 - 642 = -24
-24 ÷ 642 = -0.037383177570093455
-0.037383177570093455 x 100 = -3.74%