2155.56% is the change from 18 to 406
Calculation steps:
[( 406 - 18 ) ÷ 18] x 100 = 2155.56%
Formula
Percentage change = [(406 - 18) / 18] x 100
Subtract the new number by the original number
406 - 18 = 388
388 ÷ 18 = 21.555555555555557
21.555555555555557 x 100 = 2155.56%