3040% is the change from 20 to 628
Calculation steps:
[( 628 - 20 ) ÷ 20] x 100 = 3040%
Formula
Percentage change = [(628 - 20) / 20] x 100
Subtract the new number by the original number
628 - 20 = 608
608 ÷ 20 = 30.4
30.4 x 100 = 3040%
Example