3.28% is the change from 641 to 662
Calculation steps:
[( 662 - 641 ) ÷ 641] x 100 = 3.28%
Formula
Percentage change = [(662 - 641) / 641] x 100
Subtract the new number by the original number
662 - 641 = 21
21 ÷ 641 = 0.0327613104524181
0.0327613104524181 x 100 = 3.28%