-0.85% is the change from 821 to 814
Calculation steps:
[( 814 - 821 ) ÷ 821] x 100 = -0.85%
Formula
Percentage change = [(814 - 821) / 821] x 100
Subtract the new number by the original number
814 - 821 = -7
-7 ÷ 821 = -0.008526187576126675
-0.008526187576126675 x 100 = -0.85%