3100% is the change from 18 to 576
Calculation steps:
[( 576 - 18 ) ÷ 18] x 100 = 3100%
Formula
Percentage change = [(576 - 18) / 18] x 100
Subtract the new number by the original number
576 - 18 = 558
558 ÷ 18 = 31
31 x 100 = 3100%
Example