3127.78% is the change from 18 to 581
Calculation steps:
[( 581 - 18 ) ÷ 18] x 100 = 3127.78%
Formula
Percentage change = [(581 - 18) / 18] x 100
Subtract the new number by the original number
581 - 18 = 563
563 ÷ 18 = 31.27777777777778
31.27777777777778 x 100 = 3127.78%