-51.91% is the change from 994 to 478
Calculation steps:
[( 478 - 994 ) ÷ 994] x 100 = -51.91%
Formula
Percentage change = [(478 - 994) / 994] x 100
Subtract the new number by the original number
478 - 994 = -516
-516 ÷ 994 = -0.5191146881287726
-0.5191146881287726 x 100 = -51.91%