2427.78% is the change from 18 to 455
Calculation steps:
[( 455 - 18 ) ÷ 18] x 100 = 2427.78%
Formula
Percentage change = [(455 - 18) / 18] x 100
Subtract the new number by the original number
455 - 18 = 437
437 ÷ 18 = 24.27777777777778
24.27777777777778 x 100 = 2427.78%