-5.2% is the change from 865 to 820
Calculation steps:
[( 820 - 865 ) ÷ 865] x 100 = -5.2%
Formula
Percentage change = [(820 - 865) / 865] x 100
Subtract the new number by the original number
820 - 865 = -45
-45 ÷ 865 = -0.05202312138728324
-0.05202312138728324 x 100 = -5.2%