-49.4% is the change from 994 to 503
Calculation steps:
[( 503 - 994 ) ÷ 994] x 100 = -49.4%
Formula
Percentage change = [(503 - 994) / 994] x 100
Subtract the new number by the original number
503 - 994 = -491
-491 ÷ 994 = -0.4939637826961771
-0.4939637826961771 x 100 = -49.4%