-39.18% is the change from 809 to 492
Calculation steps:
[( 492 - 809 ) ÷ 809] x 100 = -39.18%
Formula
Percentage change = [(492 - 809) / 809] x 100
Subtract the new number by the original number
492 - 809 = -317
-317 ÷ 809 = -0.39184177997527814
-0.39184177997527814 x 100 = -39.18%