0.62% is the change from 642 to 646
Calculation steps:
[( 646 - 642 ) ÷ 642] x 100 = 0.62%
Formula
Percentage change = [(646 - 642) / 642] x 100
Subtract the new number by the original number
646 - 642 = 4
4 ÷ 642 = 0.006230529595015576
0.006230529595015576 x 100 = 0.62%