-39.12% is the change from 818 to 498
Calculation steps:
[( 498 - 818 ) ÷ 818] x 100 = -39.12%
Formula
Percentage change = [(498 - 818) / 818] x 100
Subtract the new number by the original number
498 - 818 = -320
-320 ÷ 818 = -0.39119804400978
-0.39119804400978 x 100 = -39.12%