2255.56% is the change from 18 to 424
Calculation steps:
[( 424 - 18 ) ÷ 18] x 100 = 2255.56%
Formula
Percentage change = [(424 - 18) / 18] x 100
Subtract the new number by the original number
424 - 18 = 406
406 ÷ 18 = 22.555555555555557
22.555555555555557 x 100 = 2255.56%