-39.58% is the change from 811 to 490
Calculation steps:
[( 490 - 811 ) ÷ 811] x 100 = -39.58%
Formula
Percentage change = [(490 - 811) / 811] x 100
Subtract the new number by the original number
490 - 811 = -321
-321 ÷ 811 = -0.3958076448828607
-0.3958076448828607 x 100 = -39.58%