394.57% is the change from 129 to 638
Calculation steps:
[( 638 - 129 ) ÷ 129] x 100 = 394.57%
Formula
Percentage change = [(638 - 129) / 129] x 100
Subtract the new number by the original number
638 - 129 = 509
509 ÷ 129 = 3.945736434108527
3.945736434108527 x 100 = 394.57%