571.43% is the change from 91 to 611
Calculation steps:
[( 611 - 91 ) ÷ 91] x 100 = 571.43%
Formula
Percentage change = [(611 - 91) / 91] x 100
Subtract the new number by the original number
611 - 91 = 520
520 ÷ 91 = 5.714285714285714
5.714285714285714 x 100 = 571.43%