406.35% is the change from 126 to 638
Calculation steps:
[( 638 - 126 ) ÷ 126] x 100 = 406.35%
Formula
Percentage change = [(638 - 126) / 126] x 100
Subtract the new number by the original number
638 - 126 = 512
512 ÷ 126 = 4.063492063492063
4.063492063492063 x 100 = 406.35%