-50.45% is the change from 993 to 492
Calculation steps:
[( 492 - 993 ) ÷ 993] x 100 = -50.45%
Formula
Percentage change = [(492 - 993) / 993] x 100
Subtract the new number by the original number
492 - 993 = -501
-501 ÷ 993 = -0.5045317220543807
-0.5045317220543807 x 100 = -50.45%