-50.3% is the change from 994 to 494
Calculation steps:
[( 494 - 994 ) ÷ 994] x 100 = -50.3%
Formula
Percentage change = [(494 - 994) / 994] x 100
Subtract the new number by the original number
494 - 994 = -500
-500 ÷ 994 = -0.5030181086519114
-0.5030181086519114 x 100 = -50.3%