2680% is the change from 20 to 556
Calculation steps:
[( 556 - 20 ) ÷ 20] x 100 = 2680%
Formula
Percentage change = [(556 - 20) / 20] x 100
Subtract the new number by the original number
556 - 20 = 536
536 ÷ 20 = 26.8
26.8 x 100 = 2680%
Example