3105.56% is the change from 18 to 577
Calculation steps:
[( 577 - 18 ) ÷ 18] x 100 = 3105.56%
Formula
Percentage change = [(577 - 18) / 18] x 100
Subtract the new number by the original number
577 - 18 = 559
559 ÷ 18 = 31.055555555555557
31.055555555555557 x 100 = 3105.56%