6.76% is the change from 621 to 663
Calculation steps:
[( 663 - 621 ) ÷ 621] x 100 = 6.76%
Formula
Percentage change = [(663 - 621) / 621] x 100
Subtract the new number by the original number
663 - 621 = 42
42 ÷ 621 = 0.06763285024154589
0.06763285024154589 x 100 = 6.76%