21.13% is the change from 388 to 470
Calculation steps:
[( 470 - 388 ) ÷ 388] x 100 = 21.13%
Formula
Percentage change = [(470 - 388) / 388] x 100
Subtract the new number by the original number
470 - 388 = 82
82 ÷ 388 = 0.211340206185567
0.211340206185567 x 100 = 21.13%