2438.89% is the change from 18 to 457
Calculation steps:
[( 457 - 18 ) ÷ 18] x 100 = 2438.89%
Formula
Percentage change = [(457 - 18) / 18] x 100
Subtract the new number by the original number
457 - 18 = 439
439 ÷ 18 = 24.38888888888889
24.38888888888889 x 100 = 2438.89%