25.56% is the change from 399 to 501
Calculation steps:
[( 501 - 399 ) ÷ 399] x 100 = 25.56%
Formula
Percentage change = [(501 - 399) / 399] x 100
Subtract the new number by the original number
501 - 399 = 102
102 ÷ 399 = 0.2556390977443609
0.2556390977443609 x 100 = 25.56%