538% is the change from 100 to 638
Calculation steps:
[( 638 - 100 ) ÷ 100] x 100 = 538%
Formula
Percentage change = [(638 - 100) / 100] x 100
Subtract the new number by the original number
638 - 100 = 538
538 ÷ 100 = 5.38
5.38 x 100 = 538%
Example