-49.2% is the change from 994 to 505
Calculation steps:
[( 505 - 994 ) ÷ 994] x 100 = -49.2%
Formula
Percentage change = [(505 - 994) / 994] x 100
Subtract the new number by the original number
505 - 994 = -489
-489 ÷ 994 = -0.4919517102615694
-0.4919517102615694 x 100 = -49.2%