-39.53% is the change from 812 to 491
Calculation steps:
[( 491 - 812 ) ÷ 812] x 100 = -39.53%
Formula
Percentage change = [(491 - 812) / 812] x 100
Subtract the new number by the original number
491 - 812 = -321
-321 ÷ 812 = -0.39532019704433496
-0.39532019704433496 x 100 = -39.53%