0.16% is the change from 642 to 643
Calculation steps:
[( 643 - 642 ) ÷ 642] x 100 = 0.16%
Formula
Percentage change = [(643 - 642) / 642] x 100
Subtract the new number by the original number
643 - 642 = 1
1 ÷ 642 = 0.001557632398753894
0.001557632398753894 x 100 = 0.16%