3020% is the change from 20 to 624
Calculation steps:
[( 624 - 20 ) ÷ 20] x 100 = 3020%
Formula
Percentage change = [(624 - 20) / 20] x 100
Subtract the new number by the original number
624 - 20 = 604
604 ÷ 20 = 30.2
30.2 x 100 = 3020%
Example