-39.48% is the change from 813 to 492
Calculation steps:
[( 492 - 813 ) ÷ 813] x 100 = -39.48%
Formula
Percentage change = [(492 - 813) / 813] x 100
Subtract the new number by the original number
492 - 813 = -321
-321 ÷ 813 = -0.3948339483394834
-0.3948339483394834 x 100 = -39.48%