2650% is the change from 18 to 495
Calculation steps:
[( 495 - 18 ) ÷ 18] x 100 = 2650%
Formula
Percentage change = [(495 - 18) / 18] x 100
Subtract the new number by the original number
495 - 18 = 477
477 ÷ 18 = 26.5
26.5 x 100 = 2650%
Example