-50.8% is the change from 994 to 489
Calculation steps:
[( 489 - 994 ) ÷ 994] x 100 = -50.8%
Formula
Percentage change = [(489 - 994) / 994] x 100
Subtract the new number by the original number
489 - 994 = -505
-505 ÷ 994 = -0.5080482897384306
-0.5080482897384306 x 100 = -50.8%