-44.46% is the change from 821 to 456
Calculation steps:
[( 456 - 821 ) ÷ 821] x 100 = -44.46%
Formula
Percentage change = [(456 - 821) / 821] x 100
Subtract the new number by the original number
456 - 821 = -365
-365 ÷ 821 = -0.4445797807551766
-0.4445797807551766 x 100 = -44.46%