4.52% is the change from 620 to 648
Calculation steps:
[( 648 - 620 ) ÷ 620] x 100 = 4.52%
Formula
Percentage change = [(648 - 620) / 620] x 100
Subtract the new number by the original number
648 - 620 = 28
28 ÷ 620 = 0.04516129032258064
0.04516129032258064 x 100 = 4.52%