21.39% is the change from 388 to 471
Calculation steps:
[( 471 - 388 ) ÷ 388] x 100 = 21.39%
Formula
Percentage change = [(471 - 388) / 388] x 100
Subtract the new number by the original number
471 - 388 = 83
83 ÷ 388 = 0.21391752577319587
0.21391752577319587 x 100 = 21.39%