-0.61% is the change from 826 to 821
Calculation steps:
[( 821 - 826 ) ÷ 826] x 100 = -0.61%
Formula
Percentage change = [(821 - 826) / 826] x 100
Subtract the new number by the original number
821 - 826 = -5
-5 ÷ 826 = -0.006053268765133172
-0.006053268765133172 x 100 = -0.61%