0.31% is the change from 646 to 648
Calculation steps:
[( 648 - 646 ) ÷ 646] x 100 = 0.31%
Formula
Percentage change = [(648 - 646) / 646] x 100
Subtract the new number by the original number
648 - 646 = 2
2 ÷ 646 = 0.0030959752321981426
0.0030959752321981426 x 100 = 0.31%