2857.14% is the change from 21 to 621
Calculation steps:
[( 621 - 21 ) ÷ 21] x 100 = 2857.14%
Formula
Percentage change = [(621 - 21) / 21] x 100
Subtract the new number by the original number
621 - 21 = 600
600 ÷ 21 = 28.571428571428573
28.571428571428573 x 100 = 2857.14%