-94.59% is the change from 999 to 54
Calculation steps:
[( 54 - 999 ) ÷ 999] x 100 = -94.59%
Formula
Percentage change = [(54 - 999) / 999] x 100
Subtract the new number by the original number
54 - 999 = -945
-945 ÷ 999 = -0.9459459459459459
-0.9459459459459459 x 100 = -94.59%