-50.25% is the change from 993 to 494
Calculation steps:
[( 494 - 993 ) ÷ 993] x 100 = -50.25%
Formula
Percentage change = [(494 - 993) / 993] x 100
Subtract the new number by the original number
494 - 993 = -499
-499 ÷ 993 = -0.5025176233635448
-0.5025176233635448 x 100 = -50.25%