2950% is the change from 20 to 610
Calculation steps:
[( 610 - 20 ) ÷ 20] x 100 = 2950%
Formula
Percentage change = [(610 - 20) / 20] x 100
Subtract the new number by the original number
610 - 20 = 590
590 ÷ 20 = 29.5
29.5 x 100 = 2950%
Example