29.12% is the change from 388 to 501
Calculation steps:
[( 501 - 388 ) ÷ 388] x 100 = 29.12%
Formula
Percentage change = [(501 - 388) / 388] x 100
Subtract the new number by the original number
501 - 388 = 113
113 ÷ 388 = 0.2912371134020619
0.2912371134020619 x 100 = 29.12%