30.19% is the change from 477 to 621
Calculation steps:
[( 621 - 477 ) ÷ 477] x 100 = 30.19%
Formula
Percentage change = [(621 - 477) / 477] x 100
Subtract the new number by the original number
621 - 477 = 144
144 ÷ 477 = 0.3018867924528302
0.3018867924528302 x 100 = 30.19%