-1.46% is the change from 821 to 809
Calculation steps:
[( 809 - 821 ) ÷ 821] x 100 = -1.46%
Formula
Percentage change = [(809 - 821) / 821] x 100
Subtract the new number by the original number
809 - 821 = -12
-12 ÷ 821 = -0.014616321559074299
-0.014616321559074299 x 100 = -1.46%