63700% is the change from 1 to 638
Calculation steps:
[( 638 - 1 ) ÷ 1] x 100 = 63700%
Formula
Percentage change = [(638 - 1) / 1] x 100
Subtract the new number by the original number
638 - 1 = 637
637 ÷ 1 = 637
637 x 100 = 63700%
Example