18.39% is the change from 397 to 470
Calculation steps:
[( 470 - 397 ) ÷ 397] x 100 = 18.39%
Formula
Percentage change = [(470 - 397) / 397] x 100
Subtract the new number by the original number
470 - 397 = 73
73 ÷ 397 = 0.18387909319899245
0.18387909319899245 x 100 = 18.39%