-40.93% is the change from 821 to 485
Calculation steps:
[( 485 - 821 ) ÷ 821] x 100 = -40.93%
Formula
Percentage change = [(485 - 821) / 821] x 100
Subtract the new number by the original number
485 - 821 = -336
-336 ÷ 821 = -0.4092570036540804
-0.4092570036540804 x 100 = -40.93%