-6.28% is the change from 876 to 821
Calculation steps:
[( 821 - 876 ) ÷ 876] x 100 = -6.28%
Formula
Percentage change = [(821 - 876) / 876] x 100
Subtract the new number by the original number
821 - 876 = -55
-55 ÷ 876 = -0.06278538812785388
-0.06278538812785388 x 100 = -6.28%