2809.52% is the change from 21 to 611
Calculation steps:
[( 611 - 21 ) ÷ 21] x 100 = 2809.52%
Formula
Percentage change = [(611 - 21) / 21] x 100
Subtract the new number by the original number
611 - 21 = 590
590 ÷ 21 = 28.095238095238095
28.095238095238095 x 100 = 2809.52%