2571.43% is the change from 21 to 561
Calculation steps:
[( 561 - 21 ) ÷ 21] x 100 = 2571.43%
Formula
Percentage change = [(561 - 21) / 21] x 100
Subtract the new number by the original number
561 - 21 = 540
540 ÷ 21 = 25.714285714285715
25.714285714285715 x 100 = 2571.43%