2980% is the change from 20 to 616
Calculation steps:
[( 616 - 20 ) ÷ 20] x 100 = 2980%
Formula
Percentage change = [(616 - 20) / 20] x 100
Subtract the new number by the original number
616 - 20 = 596
596 ÷ 20 = 29.8
29.8 x 100 = 2980%
Example