60.71% is the change from 397 to 638
Calculation steps:
[( 638 - 397 ) ÷ 397] x 100 = 60.71%
Formula
Percentage change = [(638 - 397) / 397] x 100
Subtract the new number by the original number
638 - 397 = 241
241 ÷ 397 = 0.6070528967254408
0.6070528967254408 x 100 = 60.71%