21300% is the change from 3 to 642
Calculation steps:
[( 642 - 3 ) ÷ 3] x 100 = 21300%
Formula
Percentage change = [(642 - 3) / 3] x 100
Subtract the new number by the original number
642 - 3 = 639
639 ÷ 3 = 213
213 x 100 = 21300%
Example