-39.49% is the change from 818 to 495
Calculation steps:
[( 495 - 818 ) ÷ 818] x 100 = -39.49%
Formula
Percentage change = [(495 - 818) / 818] x 100
Subtract the new number by the original number
495 - 818 = -323
-323 ÷ 818 = -0.39486552567237165
-0.39486552567237165 x 100 = -39.49%