-93.41% is the change from 820 to 54
Calculation steps:
[( 54 - 820 ) ÷ 820] x 100 = -93.41%
Formula
Percentage change = [(54 - 820) / 820] x 100
Subtract the new number by the original number
54 - 820 = -766
-766 ÷ 820 = -0.9341463414634147
-0.9341463414634147 x 100 = -93.41%