2555% is the change from 20 to 531
Calculation steps:
[( 531 - 20 ) ÷ 20] x 100 = 2555%
Formula
Percentage change = [(531 - 20) / 20] x 100
Subtract the new number by the original number
531 - 20 = 511
511 ÷ 20 = 25.55
25.55 x 100 = 2555%
Example