-49.45% is the change from 993 to 502
Calculation steps:
[( 502 - 993 ) ÷ 993] x 100 = -49.45%
Formula
Percentage change = [(502 - 993) / 993] x 100
Subtract the new number by the original number
502 - 993 = -491
-491 ÷ 993 = -0.4944612286002014
-0.4944612286002014 x 100 = -49.45%