2450% is the change from 18 to 459
Calculation steps:
[( 459 - 18 ) ÷ 18] x 100 = 2450%
Formula
Percentage change = [(459 - 18) / 18] x 100
Subtract the new number by the original number
459 - 18 = 441
441 ÷ 18 = 24.5
24.5 x 100 = 2450%
Example