-49.5% is the change from 996 to 503
Calculation steps:
[( 503 - 996 ) ÷ 996] x 100 = -49.5%
Formula
Percentage change = [(503 - 996) / 996] x 100
Subtract the new number by the original number
503 - 996 = -493
-493 ÷ 996 = -0.49497991967871485
-0.49497991967871485 x 100 = -49.5%