3.55% is the change from 648 to 671
Calculation steps:
[( 671 - 648 ) ÷ 648] x 100 = 3.55%
Formula
Percentage change = [(671 - 648) / 648] x 100
Subtract the new number by the original number
671 - 648 = 23
23 ÷ 648 = 0.035493827160493825
0.035493827160493825 x 100 = 3.55%