3.74% is the change from 642 to 666
Calculation steps:
[( 666 - 642 ) ÷ 642] x 100 = 3.74%
Formula
Percentage change = [(666 - 642) / 642] x 100
Subtract the new number by the original number
666 - 642 = 24
24 ÷ 642 = 0.037383177570093455
0.037383177570093455 x 100 = 3.74%