3.56% is the change from 646 to 669
Calculation steps:
[( 669 - 646 ) ÷ 646] x 100 = 3.56%
Formula
Percentage change = [(669 - 646) / 646] x 100
Subtract the new number by the original number
669 - 646 = 23
23 ÷ 646 = 0.03560371517027864
0.03560371517027864 x 100 = 3.56%