-39.66% is the change from 812 to 490
Calculation steps:
[( 490 - 812 ) ÷ 812] x 100 = -39.66%
Formula
Percentage change = [(490 - 812) / 812] x 100
Subtract the new number by the original number
490 - 812 = -322
-322 ÷ 812 = -0.39655172413793105
-0.39655172413793105 x 100 = -39.66%