2650% is the change from 20 to 550
Calculation steps:
[( 550 - 20 ) ÷ 20] x 100 = 2650%
Formula
Percentage change = [(550 - 20) / 20] x 100
Subtract the new number by the original number
550 - 20 = 530
530 ÷ 20 = 26.5
26.5 x 100 = 2650%
Example