-96.36% is the change from 495 to 18
Calculation steps:
[( 18 - 495 ) ÷ 495] x 100 = -96.36%
Formula
Percentage change = [(18 - 495) / 495] x 100
Subtract the new number by the original number
18 - 495 = -477
-477 ÷ 495 = -0.9636363636363636
-0.9636363636363636 x 100 = -96.36%