21200% is the change from 3 to 639
Calculation steps:
[( 639 - 3 ) ÷ 3] x 100 = 21200%
Formula
Percentage change = [(639 - 3) / 3] x 100
Subtract the new number by the original number
639 - 3 = 636
636 ÷ 3 = 212
212 x 100 = 21200%
Example