2772.22% is the change from 18 to 517
Calculation steps:
[( 517 - 18 ) ÷ 18] x 100 = 2772.22%
Formula
Percentage change = [(517 - 18) / 18] x 100
Subtract the new number by the original number
517 - 18 = 499
499 ÷ 18 = 27.72222222222222
27.72222222222222 x 100 = 2772.22%