-49.95% is the change from 993 to 497
Calculation steps:
[( 497 - 993 ) ÷ 993] x 100 = -49.95%
Formula
Percentage change = [(497 - 993) / 993] x 100
Subtract the new number by the original number
497 - 993 = -496
-496 ÷ 993 = -0.499496475327291
-0.499496475327291 x 100 = -49.95%