3472.22% is the change from 18 to 643
Calculation steps:
[( 643 - 18 ) ÷ 18] x 100 = 3472.22%
Formula
Percentage change = [(643 - 18) / 18] x 100
Subtract the new number by the original number
643 - 18 = 625
625 ÷ 18 = 34.72222222222222
34.72222222222222 x 100 = 3472.22%