-49.5% is the change from 994 to 502
Calculation steps:
[( 502 - 994 ) ÷ 994] x 100 = -49.5%
Formula
Percentage change = [(502 - 994) / 994] x 100
Subtract the new number by the original number
502 - 994 = -492
-492 ÷ 994 = -0.4949698189134809
-0.4949698189134809 x 100 = -49.5%