-49.35% is the change from 993 to 503
Calculation steps:
[( 503 - 993 ) ÷ 993] x 100 = -49.35%
Formula
Percentage change = [(503 - 993) / 993] x 100
Subtract the new number by the original number
503 - 993 = -490
-490 ÷ 993 = -0.49345417925478346
-0.49345417925478346 x 100 = -49.35%