-5.42% is the change from 867 to 820
Calculation steps:
[( 820 - 867 ) ÷ 867] x 100 = -5.42%
Formula
Percentage change = [(820 - 867) / 867] x 100
Subtract the new number by the original number
820 - 867 = -47
-47 ÷ 867 = -0.05420991926182238
-0.05420991926182238 x 100 = -5.42%