2428.57% is the change from 21 to 531
Calculation steps:
[( 531 - 21 ) ÷ 21] x 100 = 2428.57%
Formula
Percentage change = [(531 - 21) / 21] x 100
Subtract the new number by the original number
531 - 21 = 510
510 ÷ 21 = 24.285714285714285
24.285714285714285 x 100 = 2428.57%