-93.54% is the change from 821 to 53
Calculation steps:
[( 53 - 821 ) ÷ 821] x 100 = -93.54%
Formula
Percentage change = [(53 - 821) / 821] x 100
Subtract the new number by the original number
53 - 821 = -768
-768 ÷ 821 = -0.9354445797807551
-0.9354445797807551 x 100 = -93.54%