-96.39% is the change from 498 to 18
Calculation steps:
[( 18 - 498 ) ÷ 498] x 100 = -96.39%
Formula
Percentage change = [(18 - 498) / 498] x 100
Subtract the new number by the original number
18 - 498 = -480
-480 ÷ 498 = -0.963855421686747
-0.963855421686747 x 100 = -96.39%