-0.73% is the change from 826 to 820
Calculation steps:
[( 820 - 826 ) ÷ 826] x 100 = -0.73%
Formula
Percentage change = [(820 - 826) / 826] x 100
Subtract the new number by the original number
820 - 826 = -6
-6 ÷ 826 = -0.007263922518159807
-0.007263922518159807 x 100 = -0.73%