21333.33% is the change from 3 to 643
Calculation steps:
[( 643 - 3 ) ÷ 3] x 100 = 21333.33%
Formula
Percentage change = [(643 - 3) / 3] x 100
Subtract the new number by the original number
643 - 3 = 640
640 ÷ 3 = 213.33333333333334
213.33333333333334 x 100 = 21333.33%