3906.25% is the change from 16 to 641
Calculation steps:
[( 641 - 16 ) ÷ 16] x 100 = 3906.25%
Formula
Percentage change = [(641 - 16) / 16] x 100
Subtract the new number by the original number
641 - 16 = 625
625 ÷ 16 = 39.0625
39.0625 x 100 = 3906.25%