2638.89% is the change from 18 to 493
Calculation steps:
[( 493 - 18 ) ÷ 18] x 100 = 2638.89%
Formula
Percentage change = [(493 - 18) / 18] x 100
Subtract the new number by the original number
493 - 18 = 475
475 ÷ 18 = 26.38888888888889
26.38888888888889 x 100 = 2638.89%