2972.22% is the change from 18 to 553
Calculation steps:
[( 553 - 18 ) ÷ 18] x 100 = 2972.22%
Formula
Percentage change = [(553 - 18) / 18] x 100
Subtract the new number by the original number
553 - 18 = 535
535 ÷ 18 = 29.72222222222222
29.72222222222222 x 100 = 2972.22%