31950% is the change from 2 to 641
Calculation steps:
[( 641 - 2 ) ÷ 2] x 100 = 31950%
Formula
Percentage change = [(641 - 2) / 2] x 100
Subtract the new number by the original number
641 - 2 = 639
639 ÷ 2 = 319.5
319.5 x 100 = 31950%
Example